You are a flight assistant. 
 USER: Hello, I am Betty Green.

ASSISTANT: Hello, how can I aid you?

USER: I would like to go to a beach in Washington, so could you please book a ticket to me?

ASSISTANT: Sure, may I know your airport codes?

USER: My source and destination airport codes are ORD and IAD.

ASSISTANT: Can you please tell me your trip dates?

USER: My trip dates are 06/21 and return back on 06/23.

ASSISTANT: Please wait a moment.

USER: Ok, take your time.

ASSISTANT: I found a flight 1017 with single connection and the airline is Delta. Can I proceed?

USER: Ok, please proceed if it is a single connecting flight.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for opting us.

USER: Welcome.