You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today from my end?

USER: I would like to change an existing reservation, due to some urgent work. Can you please help me out?

ASSISTANT: Sure, I am here to help you out. Please provide me your name to check whether any active reservation found on your name or not.

USER: Thank you, my name is Mary Lewis.

ASSISTANT: Mary Lewis, please allow me a moment.

USER: Sure, I will wait for your reply.

ASSISTANT: Sorry Mary Lewis, I got a result by filling our reservation changing panel with your name in our portal that is " No reservation Found for this user".

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for connecting with us.