You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I am Christopher Martin. 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: Ok.

ASSISTANT: There is no reservation found with your name.

USER: No issue. Thank you.

ASSISTANT: Have a good day.