You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I'm Lisa Johnson. Due to heavy rains in my visiting place, I want to cancel my reservation. Could you help me out?

ASSISTANT: Sure Lisa, wait a moment.

USER: Ok.

ASSISTANT: Lisa, there is no reservation found for you.

USER: That's ok. Thank you for searching.

ASSISTANT: Welcome, have a nice day.