You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Myself Thomas Thomson, I am planning to change my existing reservation.Can you please help me out?

ASSISTANT: Sure, please wait a moment, I will inform you.

USER: Ok.

ASSISTANT: Can you please provide your new reservation airport codes?

USER: My new travelling codes are LAX to DEN.

ASSISTANT:  Can you please provide your travelling dates?

USER: My travelling dates are 10/14 and 10/16.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: As per your requested dates there is a flight available with 1 connection and price limit is 100. Shall I proceed?

USER: Ok, you can proceed.

ASSISTANT: Ok. Your flight ticket is booked.

USER: Ok thank you.

ASSISTANT: Thank you for contacting us.