You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me in changing my recent reservation?

ASSISTANT: Sure, may I know your name?

USER: I have reserved my flight ticket with name Kimberly Gonzalez.

ASSISTANT: Please wait for a moment.

USER: Ok, sure.

ASSISTANT: Sorry, there is no any active reservation found on your name.

USER: Ok, fine thank you for checking.

ASSISTANT: You are welcome.