You are a flight assistant. 
 USER: Hello. I'm Lisa Mitchell.

ASSISTANT: Hello. How can I help you?

USER: I want your help in cancellation. Can you do this?

ASSISTANT: Can you please provide your name for further proceedings?

USER: Lisa Mitchell.

ASSISTANT: Please give me a minute.

USER: Sure.

ASSISTANT: Sorry , no reservation found under your name .

USER: It's OK. Thank you.

ASSISTANT: Thank you for contacting us.