You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help 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, can you share your name please to check further?

USER: Rachel Edwards here.

ASSISTANT: Sorry, no reservation found with your name in our portal to cancel it.

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

ASSISTANT: Thank you for contacting us.