You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I want to cancel my reservation due to some issues, can you help me in this?

ASSISTANT: How can I assist you? May I know your name to cancel your ticket?

USER: Myself Betty Green.

ASSISTANT: Let me check. Sorry, no reservation found by your name.

USER: That's ok. Thank you for your help.

ASSISTANT: Thank you for reaching us.