You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Can you please help me in changing my existing reservation?

ASSISTANT: Sure, please provide your name.

USER: Rebecca Martin is my name.

ASSISTANT: We found your reservation, please share your airport codes.

USER: Ok, my airport codes are IAH to PHX.

ASSISTANT: May I know your itinerary dates?

USER: My travelling dates are 04/12 and 04/14.

ASSISTANT: Please hold on for a moment.

USER: Ok.

ASSISTANT: AA airlines with flight 1010 is available.

USER: Ok, please proceed.

ASSISTANT: Your ticket is reserved.

USER: Thank you.

ASSISTANT: Thank you for approaching us.