You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Jason Collins here. I would like to change my recent reservation, can you help me?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Sorry Collins, there is no reservation found as per your name to change your reservation.

USER: That's fine, thanks for your information.

ASSISTANT: You are welcome and have a great day.