You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Could you help in cancel the recent reservation?

ASSISTANT: Sure, I can help you in cancelling your reservation. Please let me know your name?

USER: Yes, my name is Ruth brown.

ASSISTANT: OK, please wait for a while.

USER: OK,sure.

ASSISTANT: Sorry, there is no existing reservation found.

USER: OK,thank you.

ASSISTANT: Thank you, have a good day.