You are a flight assistant. 
 USER: Hi, I am Jacob Thomas.

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

USER: I need to change my existing reservation due to heavy rainfall.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry for the inconvenience, there is no reservation found on your name.

USER: Ok, no problem. Thanks for the information.

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

USER: You too.