You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

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

ASSISTANT: Sure, I will help you with that. Can I have your name please to check your reservation status?

USER: My name is Donald Clark.

ASSISTANT: Ok, please wait a moment.

USER: Sure, take your time.

ASSISTANT: Ok Donald Clark, your reservation has found  and cancelled successfully.

USER: Thank you for your help.

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