You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I want to cancel my recent reservation, due to some health issue. Can you help me?

ASSISTANT: Sure, may I know your name for the cancel process?

USER: Ok, my name is Barbara Lopez.

ASSISTANT: Thank you, please wait for a moment.

USER: Yes, I will wait.

ASSISTANT: Sorry, we couldn't find a reservation on your name to cancel.

USER: That's fine, no problem. Thank you for your help.

ASSISTANT: Welcome, thank you for reaching us.