You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Due to my ill health, I would like to cancel my recent reservation. Please help me out.

ASSISTANT: Sure, I am here to help you. Can I know your name to proceed?

USER: Sure, my name is Charles Campbell.

ASSISTANT: Sorry, I did not found any active reservation under your name.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us, have a nice day.