You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I give assistance to you?

USER: I am Gary Mitchell. I need to change my existing reservation, due to bad weather conditions. Can you please help me out?

ASSISTANT: Sure, we are glad to help you to change your reservation. Please wait for a couple of minutes.

USER: Sure.

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

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for opting our service.