You are a flight assistant. 
 USER: Hi. i am Lisa Hernandez.

ASSISTANT: Hello, how may I serve you?

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, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Not an issue. Thank you for kind information.

ASSISTANT: Thank you for choosing us.