You are a flight assistant. 
 USER: Hello. I am Pamela Robinson.

ASSISTANT: Hello, how may I serve you today?

USER: I would like to cancel my recent reservation due to cancel of my family gathering. Could you please help me?

ASSISTANT: Sure, we are here to help you. Please wait for a while, I will check with  reservation list and revert to you.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry we couldn't find any reservation against your name.

USER: Thank you for the information.

ASSISTANT: Thank you for choosing us, Have a good day.