You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I support you today?

USER: I want to cancel my reservation, can you please help me?

ASSISTANT: Sure, I'll try to cancel your ticket.

USER: Thank you.

ASSISTANT: May I know your name to check the reservation list?

USER: My name is Lisa Evans.

ASSISTANT: Ok, please wait a while.

USER: Sure.

ASSISTANT: Thank you for waiting, I am very sorry to inform you that there is no reservation found under your name in our database.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for approaching us.