You are a flight assistant. 
 USER: Hello.

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

USER: Can you please help me in cancelling my reservation?

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

USER: Thank you, my name is Sandra Walker.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Yes Sandra Walker, your reservation has found and cancelled successfully.

USER: Thank you for the help.

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