You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you help me in booking my flight ticket from ATL to DCA?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My trip dates will be June 23rd to June 25th.

ASSISTANT: Do you have any other specifications?

USER: I prefer a direct flight.

ASSISTANT: Please help me with your name for booking.

USER: I am Thomas Phillips.

ASSISTANT: Sorry for this inconvenience, I could not find any flight with your requirements.

USER: Its ok, thank you.

ASSISTANT: Most welcome.