You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I need to cancel my reservation due to sudden change in my trip. Can you assist me?

ASSISTANT: Sure, can I have your name please?

USER: Paul Miller here.

ASSISTANT: Ok, 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 helping me.

ASSISTANT: Thank you for opting us.