You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am Jason Young. I want to change my existing reservation due to bad weather condition, can you please help me in that?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: I have searched online. But I could find your flight reservation to change it.

USER: Ok, no problem.

ASSISTANT: Thank you.

USER: Thank you for your help.