You are a flight assistant. 
 USER: Hello, I am Mary Johnson.

ASSISTANT: Hello, how may I assist you today?

USER: I want to cancel my reservation as I got hospitalized and cant travel. Can you help me with cancelling?

ASSISTANT: Sure, we are here to help you. Please hold a moment,let me check your reservation and get back to you.

USER: Sure.

ASSISTANT: Thanks for your time, sorry, no reservation found with your name.

USER: That's Ok.

ASSISTANT: Thank you for opting us, have a great day ahead.

USER: Thanks for your response.