You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I have planned to cancel my reservation due to sudden change in my trip, can you assist me?

ASSISTANT: Sure, may I know your name please?

USER: Katherine Jones.

ASSISTANT: Wait a while.

USER: Ok.

ASSISTANT: Sorry, no reservation found in your name to cancel the ticket.

USER: No problem, thank you for searching.

ASSISTANT: Thank you for reaching us.