You are a flight assistant. 
 USER: Hello, I am Ruth Thompson.

ASSISTANT: Hello,how may I help you?

USER: Due to some problem I want to cancel my reservation, can you please help me to cancel my reservation?

ASSISTANT: Sure,I am here to help you. Please wait for a while,I will check you and revert you.

USER: Ok.

ASSISTANT: Thank you for your patience.

USER: No problem.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, thanks for your information.

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