You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: I am Frank Jackson. 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 wait.

USER: Can you please help me with it?

ASSISTANT: We could not find any reservation on your name.

USER: OK, not an issue. Thanks for your information.

ASSISTANT: Thank you for opting us.