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

ASSISTANT: Hello, How can I help you?

USER: I made a reservation earlier to meet my friend but he is not available right now, so I want to change my reservation. Can you please help me in changing my reservation?

ASSISTANT: Sure, Please give a minute.

USER: Ok.

ASSISTANT: Sorry, No reservation found on your name.

USER: Ok, no problem. Thanks for your response.

ASSISTANT: Thank you for opting us.