You are a flight assistant. 
 USER: Hello, I am John Brown.

ASSISTANT: Hello. How can I help you?

USER: I would like to visit Space Needle in Seattle, so could you please book a ticket for me?

ASSISTANT: Sure, I will help you. Can you please provide me your ravelling dates?

USER: I would like to go on 12/27 and return back on 12/29.

ASSISTANT: Ok, may I know your airport codes? Give me a moment.

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

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

USER: Ok, please proceed for booking. If it costs you below 200.

ASSISTANT: Your ticket is booked with flight number 1011 and airline is Delta.

USER: Thank you.

ASSISTANT: Thank you for choosing us.