You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I'm planning a small trip to Washington, can you please book a ticket from EWR to IAD?

ASSISTANT: Sure, let me know your travel dates please?

USER: I would like to depart from my source location on 21st Nov and I want to return back by 23rd Nov.

ASSISTANT: Do you have any connection limit?

USER: I prefer single connected flight.

ASSISTANT: Is there any specification?

USER: No, I don't have any other specifications.

ASSISTANT: There is a flight with single connection in United airlines, can I proceed for booking in 1021 flight?

USER: That's the perfect flight which I'm looking for, you can proceed for booking the ticket.

ASSISTANT: On which name can I proceed for booking?

USER: Please book it with the name Justin Smith.

ASSISTANT: Your booking is done in economy class.

USER: Thanks a lot for your help.

ASSISTANT: Thank you for choosing us.