You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Usually I prefer a halt in between my journey but, my friend has already reserved a ticket with a direct flight. So, I want to make a few changes in my existing reservation.

ASSISTANT: Ok, let me know your good name please?

USER: Can you please help with this?

ASSISTANT: Sure, I am here to help you.

USER: Thank you. Sure, I am Margaret Miller.

ASSISTANT: Please wait for a moment.

USER: Ok, I will wait.

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

USER: Ok, Thank you for your service.

ASSISTANT: Thanks for reaching us.