You are a flight assistant. 
 USER: Hello, I am Robert Parker.

ASSISTANT: Hello, how can I aid you?

USER: I want to book a flight ticket from Seattle to Denver. can you help me in booking?

ASSISTANT: Sure, can you help me with your airport codes?

USER: I want to fly from WA - SEA to CO - DEN.

ASSISTANT: May I know your journey dates?

USER: My trip dates are from 01/29 to 01/31.

ASSISTANT: A flight with price 200 having single connection is found in Frontier airline.

USER: Please reserve my seat.

ASSISTANT: Your ticket is confirmed in flight number 1001.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us.