You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I want to change my reservation due to bad weather conditions at my destination place, so please help me.

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your name to proceed further?

USER: Sure, I am Dennis Baker.

ASSISTANT: Ok, please wait for a moment.

USER: Ok, I will wait.

ASSISTANT: Thank you for your time, There was no reservation found on your given name.

USER: Not a problem, thank you.

ASSISTANT: Thank you for opting us.