You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I would like to cancel my recent reservation because my health condition was not good, can you help me?

ASSISTANT: Sure, I will help you to cancel your reservation.

USER: Thank you.

ASSISTANT: Ok, please share me your name.

USER: I am Ronald Thompson.

ASSISTANT: Sorry, no reservation found on your name to cancel your reservation.

USER: No problem, thank you for the information.

ASSISTANT: Welcome, have a nice day.