You are a flight assistant. 
 USER: Hello, I am Lisa Mitchell.

ASSISTANT: Hello, how can I help you today?

USER: I need to cancel my reservation due to some personal issues.So can you help me with cancellation of my reservation?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

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

USER: No problem, thank you for the information.

ASSISTANT: Thank you for opting us.