You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Actually I made a earlier reservation to go for a trip with my friends, but heavy work load in office I want to change my reservation.

ASSISTANT: Sure, I am here to help you. Please provide your name.

USER: Jerry Johnson is my name.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

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

USER: Thank you.

ASSISTANT: Thank you for reaching us.