You are a flight assistant. 
 USER: Hello, Betty Robinson here.

ASSISTANT: Hello, how can I assist you?

USER: I want to cancel my recent reservation, due to postponement of concert to be held at the place where I wanted to visit. Can you help me out?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry to say, no reservations found with your name to cancel the ticket.

USER: That's ok. Thank you for your time.

ASSISTANT: Thank you for reaching us.