Build a "fake" chatting room using HTML, JAVA etc.

Hello, I am a Ph.D. student in Psychology and I'd like to hire an expert who can build a "fake" chatting room for my research project. The main point is that I need a website that seems like an actual chatting room and participants will receive two to three pre-designed messages from the fake chatbot (but they will believe it is an actual human). Below is a detailed description of my study procedure: The study will be described as examining how people with different personalities form impressions of and interact with others on social media. Once participants read and sign the informed consent form, they will be told that they will interact remotely with another student and will conduct a series of tasks with that student. In fact, there will be no other student and all participants will work individually. Next, participants will be asked basic demographic questions (e.g., gender, major) before they meet another participant (i.e., partner). A few seconds later, they will be told that they are paired up with a partner. Because envy is more likely to occur when compared with a similar other (Smith & Kim, 2007), the partner will be described as a Baruch student of the same gender, academic major, and year in school, as the participants. Also, the name of the post owner will be kept constant as Sam, a common gender-neutral name in the U.S. Then, participants will be directed to a virtual chatting room which is an HTML-built website. Once they see Sam enter the chatting room, they will chat with Sam for 30 seconds. In fact, a chatbot will display pre-designated generic messages to the participants (e.g., ‘Hello, nice to meet you’). This procedure is to make participants believe the existence of their ostensible partner. Specifically, participants will talk about what they did during Spring break. Once participants submit their responses to the chatting room, they will receive the pre-designed message saying "I went to Cancun because my parents bought me an airplane ticket and all-exclusive hotel fee.", which is an envy manipulation method. If my question is unclear to you, please let me know. Looking forward to receiving your response. Thank you! Best, Ashley