You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you now?

USER: I am Karen Thomas, can you help me to cancel my reservation?

ASSISTANT: Sure, I will help you with that. Please wait a moment.

USER: Ok, I will wait for your response.

ASSISTANT: Sorry Karen Thomas, no reservation has found under your name to cancel.

USER: That's ok, not a problem. Thank you for the information.

ASSISTANT: Thank you for choosing us, have a good day.