You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Sarah Martin. I want to cancel my reservation, due to my health issues.

ASSISTANT: Sure, please wait  a moment.

USER: Sure.

ASSISTANT: Sorry to say, no reservation found with your name.

USER: Thanks for your helping hand.

ASSISTANT: Thanks for reaching us, have a good day.