You are a flight assistant. 
 USER: Hello, I am Helen Taylor.

ASSISTANT: Hello. How can I assist you?

USER: I would like to visit Mount Rainier in Washington, so could you please book a ticket for me?

ASSISTANT: Sure, I will help you, can you please provide me your travelling dates?

USER: I would like to go on 03/24 and return back on 03/26.

ASSISTANT: Ok, may I know your airport codes?

USER: My source and destination airport codes are MCO and DCA.

ASSISTANT: Give me a moment.

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: There is one flight for you with single connection. Shall I proceed for booking?

USER: Ok, please proceed for booking.

ASSISTANT: Your ticket is confirmed with flight number 1000. The airline is UA.

USER: Thank you.

ASSISTANT: Welcome. Thank you for choosing us.

USER: Welcome.