You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I need to change my recent reservation, can you please help me?

ASSISTANT: Sure, I am here to help you to change the ticket details. Can I have your name please?

USER: Myself Ashley Roberts.

ASSISTANT: Ok, please allow me sometime to check the ticket status.

USER: Please make it fast.

ASSISTANT: I regret to inform you that, there is no active reservation found with your name in our database to change the details.

USER: That's ok, thank you for checking the details.