You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Jason Jackson here.

ASSISTANT: Nice to meet you Jackson.

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

ASSISTANT: Please wait for a minute to check the reservation details.

USER: Sure.

ASSISTANT: Sorry, I cannot find any reservation in our database with your name.

USER: That's ok, thanks for your information.

ASSISTANT: It's my pleasure, have a great day.