You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be at your service?

USER: Could you please cancel a reservation under the name Katherine Evans?

ASSISTANT: Ok, I will assist you for that. Please wait for a while.

USER: Sure.

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

USER: No problem, thank you for the information.

ASSISTANT: Thanks for choosing us.