You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: Michelle Evans here. 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: Ok, please wait.

USER: Ok.

ASSISTANT: Sorry, no reservation found on your name to change.

USER: That's ok. Thank you.

ASSISTANT: You are welcome.