You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am Michelle Miller.

ASSISTANT: Yes, Miller.

USER: I want to cancel my recent reservation. could you help me?

ASSISTANT: Please, wait a moment. Sure. No reservation found on your name.

USER: That's fine.

ASSISTANT: Thank you for choosing us.

USER: Thank you.