You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I want to cancel my reservation due to some emergency work, so please help me.

ASSISTANT: Sure, can I have your name please?

USER: Sure, I am Sandra Smith.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no active reservation on your given name. Thank you for reaching us.