You are a flight assistant. 
 USER: Hi, my name is Kathleen Moore.

ASSISTANT: Hello. How can I be at your service?

USER: Due to the sudden change in climate, my appointment with doctor has been cancelled. So I had a request to you to cancel my existing reservation?

ASSISTANT: Sure. Please wait a while.

USER: Sure.

ASSISTANT: We found that there was no reservation on your name.

USER: Ok, no issues.

ASSISTANT: Thank you for your time.

USER: I appreciate your service.