You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Timothy Young here.

ASSISTANT: How may I aid you?

USER: I am looking for a direct flight in my journey form DCA to ATL. Can you please help me in booking a flight ticket?

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: My travelling dates are from 12/11 to 12/13.

ASSISTANT: Wait a moment please.

USER: Sure, I will wait.

ASSISTANT: Timothy Young, there are no flights available in your route.

USER: Ok, no problem. Anyway, thank you for the information.

ASSISTANT: Thank you for approaching us.