You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, may I know your name please?

USER: Sure, Kevin Carter here.

ASSISTANT: Please be on hold.

USER: Sure.

ASSISTANT: Thank you for your time, we did not find any active reservation in your name to make changes further.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for reaching us.