You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER:  I want to cancel my recent reservation which I have done last week because my trip got cancelled. Please help me out with that.

ASSISTANT: Sure, please provide your name.

USER: My name is Charles Adams.

ASSISTANT: Ok, please wait a minute.

USER: Ok, take your time.

ASSISTANT: Sorry Charles, there is no active reservation found under your name in our records.

USER: It's ok, thank you for your help.

ASSISTANT: Most welcome.