You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am Timothy Moore. I would like to book a flight ticket from IAD to ATL.

ASSISTANT: On which dates you want to travel?

USER: I am planning to start my trip on 04/01 and return back 04/03.

ASSISTANT: Sorry, I cannot find any flight with your travel dates.

USER: Ok. Thank you for the information.

ASSISTANT: It's my pleasure, have a great day.