You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Due to sudden change in my plan, I would like to cancel my reservation. Can you help me?

ASSISTANT: Sure, I will help you. To proceed further, may I know your good name please?

USER: My name is Timothy Baker.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for being so patience, but there is no reservation found on your name.

USER: That's fine, thank you for the information.

ASSISTANT: Thanks for opting us, have a good day.

USER: Welcome.