You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: My name is Susan Garcia, I want to change my existing reservation due to bad weather condition.

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: Thank you for being patient. Unfortunately there is no reservation found by your name.

USER: No problem, thank you for your service.

ASSISTANT: Thank you for availing us.