You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you?

USER: I am Joshua Brown.

ASSISTANT: Nice to meet you.

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

ASSISTANT: Ok, please wait a moment.

USER: Sure.

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

USER: That's fine.

ASSISTANT: Thank you for choosing us.

USER: Thank you.