You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you for the day?

USER: I am Matthew Brown, I want to cancel my recent reservation due to health issues.

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

USER: Sure.

ASSISTANT: Thank you for your time. Sorry there is no reservation found on your name.

USER: No problem, thank you for your service.

ASSISTANT: Thank you for approaching us. Have a good day.