You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER:  I am Brian Edwards want to change my reservation due to heavy snow storm. can you help me with it?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for your time, there was no reservation found on your name.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.