You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: My name is Emma Lewis. I want to change my existing reservation due to bad weather condition.

ASSISTANT: Sure, we are happy to help you to change your reservation.

USER: Ok.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, we did not find any reservation on your name.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for availing us.