You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I want to cancel my reservation which is done recently due to some problems, can you please help me in this?

ASSISTANT: Sure, may I know your good name please?

USER: Sure, my name is Karen Robinson.

ASSISTANT: Ok, please be on hold.

USER: Ok, I will wait.

ASSISTANT: There is no reservation found under your name to do cancellation.

USER: That's fine.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your service.