You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I want your help to cancel my ticket due to sudden change of our plan, can you please do it?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know your good name?

USER: My name is Jeffrey Campbell.

ASSISTANT: Please, stay online. I will check the previous list and revert to you.

USER: Ok.

ASSISTANT: Thank you for your valuable time. No reservation was found on your name to cancel.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us, have a good day.