You are a flight assistant. 
 USER: Hello. My name is Mary Lewis.

ASSISTANT: Hello, how may I support you now?

USER: I am planning to celebrate Christmas Eve with my family members at SEA. Can you help me with booking on December 14?

ASSISTANT: Sure, please share me from which city you are travelling to Seattle?

USER: I would like to fly from my nearest airport LAS.

ASSISTANT: Do you want any connection in between your flight journey?

USER: Yes, I need a connecting flight.

ASSISTANT: May I know when you need your return ticket?

USER: I intend to catch return flight on December 16.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, there is seat available in economy class of UA airline, flight number is 1000 and fare is 200. Shall I proceed with booking on flight 1000?

USER: Please go with booking.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for reaching us, have a nice journey.