You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I want to cancel my recent reservation. Could you help me with that?

ASSISTANT: Sure, can I know your name to check with your details.

USER: Carol Williams.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: Sorry, there are no active reservations on your name to cancel.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for reaching our service.