You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am Jennifer Hernandez. Can you please help me in changing my recent reservation?

ASSISTANT: Sure Jennifer, I am here to help you with this.

USER: Ok.

ASSISTANT: Sorry Jennifer, there is no reservation found as per your name to modify your reservation.

USER: Ok, fine thank you for checking.

ASSISTANT: You are welcome, have a great day.