You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Gregory Jones. I would like to book a ticket from HOU. Can you please book a ticket for me?

ASSISTANT: Sure, may I know your destination airport code please?

USER: My destination airport code is ATL.

ASSISTANT: May I know your journey dates please?

USER: My travelling dates are 05/17 and 05/19.

ASSISTANT: Jones, no flights has been found on your requested details.

USER: That's fine.

ASSISTANT: Thank you for using our service.

USER: Thank you for your help.