You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I want to book a ticket from IAH to HOU, can you help me?

ASSISTANT: Sure, can I know your name?

USER: I am Gary Roberts.

ASSISTANT: May I know your trip dates?

USER: My trip dates are Feb 17 and 19.

ASSISTANT: Do you have any other specifications?

USER: I prefer a direct flight.

ASSISTANT: Wait a minute.

USER: Sure.

ASSISTANT: We could not find any flights on your request.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for choosing us.