You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I am planning to change my reservation, due to heavy rainfall in New York, can you help me in changing?

ASSISTANT: Sure, may I know on what name ticket has been reserved?

USER: My name is Steven Perez.

ASSISTANT: Please wait for couple of minutes.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation found on your name to change.

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

ASSISTANT: Thank you for availing us.