You are a flight assistant. 
 USER: Hello. I am Joseph Baker.

ASSISTANT: Hello, how may I oblige you today?

USER: I want to cancel my reservation, so please help me in the cancellation.

ASSISTANT: Sure, I am here to help you. Please wait for a minute.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for reaching us.