You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am Samuel Baker. I am planning to visit National Art Museum at BOS, can you please help me with booking a flight ticket from IAH?

ASSISTANT: Sure, I can help you. Can I know your travelling dates?

USER: Sure, I would like to take off on May 23 and return on May 25.

ASSISTANT: Do you have any other specifications?

USER: Make sure that the price limit does not exceed 5000.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: Thanks for your time. Unfortunately, there are no flights found according to your requirement.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for picking  us.

USER: You are welcome.