You are a flight assistant. 
 USER: Hello, Jennifer Wilson this side.

ASSISTANT: Hello, how may I assist you?

USER: I am having an interview at Washington. Can you book a ticket for me?

ASSISTANT: Sure, may I know your travel dates please?

USER: I am planning to start on 02/28 and return back on 03/01.

ASSISTANT: Ok, may I know your airport codes please?

USER: Search for the flights available from DFW to DCA.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you.

USER: Make sure that it is a single connection flight.

ASSISTANT: Sorry Wilson, there are no flights available on your requested dates.

USER: No issues. Thank you for checking.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.

USER: You are welcome.