You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Jason Phillips. 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. Can you help me?

ASSISTANT: Sure, please wait for a while.

USER: Ok, I will.

ASSISTANT: Thanks for waiting, there is no active reservation on your given name.

USER: That's Ok, thanks for your assistance.

ASSISTANT: Thank you for opting us.