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

ASSISTANT: Hello, how can I amend you today?

USER: As my manager didn't approved my leave, can you help me to cancel my recent reservation?

ASSISTANT: Sure, I am mirthful to help you. Please wait for a while, I will check your reservation.

USER: Sure.

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

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

ASSISTANT: Thank you for contacting us.