You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to travel from IAH to ATL. Please help me in booking my ticket.

ASSISTANT: Do you have any trip dates?

USER: Sure, my trip dates are from 12/07 to 12/09.

ASSISTANT: May I know your if you have any other requirements?

USER: I need a direct flight.

ASSISTANT: Can I know your name please?

USER: My name is Jerry Adams.

ASSISTANT: Sorry Jerry, there is no flights available.

USER: It. It's ok, thank you for your help.

ASSISTANT: Most welcome.