You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I provide assistance to you?

USER: Due to bad weather, I want to change my reservation. Can you help me?

ASSISTANT: Sure, we are here to help you. Can you please provide your name to check your reservation status?

USER: Brian Walker here.

ASSISTANT: Ok, please wait for a while, let me check your reservation status and revert to you.

USER: Ok.

ASSISTANT: Thank you for waiting. Sorry there is no reservation found with your name to change your reservation.

USER: No issue, Thanks for the information.

ASSISTANT: Thank you for choosing us, have a good day.