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, please provide your name to check with existing reservation.

USER: Jacob Allen is my name.

ASSISTANT: There is no reservation found under your name to change.

USER: That's ok, thank you.

ASSISTANT: Thank you for opting us.