You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I aid you?

USER: Can you book a flight ticket to reach DCA, Washington from Chicago, ORD?

ASSISTANT: When do you want to go from ORD?

USER: Thanks for your response. I like to leave on 01/06 and return to Chicago on 01/08.

ASSISTANT: On which name would you like to reserve this ticket?

USER: Reserve it on my name, Andrew Clark.

ASSISTANT: We could not found any flight on your route.

USER: That's ok, thanks for your help and support.

ASSISTANT: Thank you so much for choosing us.