You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I oblige you?

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

ASSISTANT: Sure, we will help you. Please allow me to check your details and I will revert to you with the status.

USER: Ok.

ASSISTANT: Thank you for your time, unfortunately we didn't found any active reservation on your name to proceed further.

USER: Not an issue, thank you for your service.

ASSISTANT: Thank you for consulting us.