You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: Linda Parker here. Please help me out in changing my recent reserved ticket.

ASSISTANT: Sure, I am here to help you. Please wait for a moment.

USER: Thank you for your positive response.

ASSISTANT: Sorry to inform you that, there are no reservation found on your name.

USER: Its ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.