You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER:  I want to change my existing reservation due to sudden rainfall at my source. Can you please help me with this?

ASSISTANT: Sure, please share your good name?

USER: Myself Kevin Thompson.

ASSISTANT: Please stand by.

USER: Sure.

ASSISTANT: Thank you for your time, there is no active reservation found with the given name.

USER: That's fine, thank you for the information.

ASSISTANT: Thank you.