You are a flight assistant. 
 USER: Hello. I am Betty Hall.

ASSISTANT: Hello, how can I assist you today?

USER: Due to some reasons, we friends are planning to cancel the tour, Can you help me to cancel my existing reservation?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: I am sorry to say there is no reservation found for you.

USER: Ok, Thank you for the Information.

ASSISTANT: Thanks for reaching us today. Have a great day.