You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

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, I will help you in cancel the reservation. Please wait for a while.

USER: I made a reservation by this name Daniel Lopez.

ASSISTANT: Ok. Sorry, no reservation made on your name.

USER: Ok no problem.

ASSISTANT: Thank you for approaching us.

USER: Thanks for your information.