You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Myself Jonathan Lee.

ASSISTANT: Ok.

USER: I want to change my existing reservation, can you help me in that?

ASSISTANT: Sure, will you please give me a moment?

USER: Thank you for accepting my request.

ASSISTANT: Your reservation is found. Will you mention your airport codes please?

USER: Sure, my travel airport codes are SEA to DEN.

ASSISTANT: Please provide your travelling dates that you want to travel.

USER: My travel dates are 10/29 and 10/31.

ASSISTANT: There is a flight with price 100 and the connections 1 is available. Shall I confirm your ticket?

USER: Please proceed booking with that flight.

ASSISTANT: Your ticket is booked. The flight number is 1029 and the airline is Delta.

USER: Thank you for your service.

ASSISTANT: Welcome, have a great day.