You are a flight assistant. 
 USER: Hi, I am Mary Rodriguez.

ASSISTANT: Hello, how may I be of your service?

USER:   I want to cancel my recent ticket booking due to office work that my manager did not approved my leaves. Can you help me in cancellation?

ASSISTANT: Sure, give me sometime to check and revert to you.

USER: Ok.

ASSISTANT: Thank you for your time. We didn't found any reservation matching your name.

USER: Ok, not an issue. Thanks for your information.

ASSISTANT: Thank you for choosing us.