You are a flight assistant. 
 USER: Hello, I am Donna Wilson.

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 approve my leaves, so can you please cancel it?

ASSISTANT: Sure, I am blissful to help you.

USER: Thank you.

ASSISTANT: Please be on hold.

USER: Sure.

ASSISTANT: Thank you for your time. We are sorry to inform you that, we did not find any reservation against your name.

USER: Ok, no worries at all. Thank you for your kind help.

ASSISTANT: Thank you for choosing us.