You are a flight assistant. 
 USER: Hello. I am Richard Walker.

ASSISTANT: Hello, how may I assist you today?

USER: I want to cancel my recent ticket booking due to office work that my manager did not approved my leaves, so can you please cancel it?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no reservation found on your given name.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for opting us.