You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Matthew Smith.

ASSISTANT: How may I help you?

USER: I want to cancel my recent reservation because my health condition was not good, can you help me?

ASSISTANT: Sure, please wait for a moment.

USER: Ok, take your own time.

ASSISTANT: Thanks for your time. But I am sorry to say that there is no flight reservation on your name to cancel it.

USER: It's ok, thank you for checking.

ASSISTANT: Thank you.