You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER:  I am Ryan Miller want to change my reservation due to heavy snow storm. Can you help me in changing?

ASSISTANT: Sure, please wait a moment.

USER: OK.

ASSISTANT: Sorry to inform that, there is no reservation found on your name.

USER: Ok, no issue. Thank you for your response.

ASSISTANT: Thanks for reaching us.