You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Kevin Lopez.

ASSISTANT: Nice to meet you.

USER: I want to change my existing reservation, due to heavy rainfall in New York.

ASSISTANT: Ok, please wait a minute.

USER: Ok.

ASSISTANT: There is no reservation found with your name.

USER: That's ok, thank you for your information.

ASSISTANT: Most welcome.