You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I oblige you today?

USER: Please change my reservation with the name of Jeffery Evans, as there is heavy rainfall at my destination.

ASSISTANT: Sure, please wait.

USER: Thank you.

ASSISTANT: There is no reservation found on your name Jeffery Evans in our database.

USER: Ok.

ASSISTANT: Thank you for availing us.

USER: Thank you.