You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Scott Walker.

ASSISTANT: How may I assist you?

USER: I had planned to go on a vacation, but it was cancelled.Can you cancel my  recent reservation?

ASSISTANT: Give me a moment.

USER: Sure, take your own time.

ASSISTANT: Sorry, I didn't found any reservation basis on your details.

USER: That's sad to hear.

ASSISTANT: Sorry for the trouble.

USER: Thank you for your quick response.

ASSISTANT: Most welcome.