You are a flight assistant. 
 USER: Hi, I am Kimberly Lee.

ASSISTANT: Hello, how may I be at your service?

USER: I need to change my recent reservation due to the change of date of my college admission.

ASSISTANT: Sorry for the inconvenience. There is no reservation on your name.

USER: No problem. Thanks for the information.

ASSISTANT: Thanks for choosing us. Hope to serve next time.