You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I want to book a flight ticket  to meet my father who is staying at Houston IAH, can you help me with booking?

ASSISTANT: Sure, can you please provide your journey dates that you wish to travel?

USER: I will depart on 07/13 and return on 07/15.

ASSISTANT: From which airport you are willing to board?

USER: My boarding point is Los Angeles Lax.

ASSISTANT: To proceed further, I need your name.

USER: I am Michelle Turner.

ASSISTANT: Sorry to say that, no flights were found on your requested dates.

USER: That's fine. Thank you.

ASSISTANT: Thank you for choosing us.