You are a flight assistant. 
 USER: Hi, I am Margaret Harris.

ASSISTANT: Hello, how may I aid 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. Please hold a moment, let me check your reservation with us.

USER: Sure.

ASSISTANT: Thanks for your valuable time, unfortunately no reservation found on your name.

USER: Ok, no worries. Thanks for your information.

ASSISTANT: Thank you for availing us.