You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Carol Turner here.

ASSISTANT: How can I help you?

USER: I would like to change my destination airport code, can you please change my existing reservation?

ASSISTANT: Please wait a moment to check the reservation status.

USER: Sure, take your time.

ASSISTANT: Sorry, no reservation found by your name.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thanks.