You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I made a reservation for round trip and got a connecting flight but now I want change a reservation with a direct flight. Can you help me to change it?

ASSISTANT: Sure, for changing reservation please provide your good name.

USER: Sure, my name is Mary Martinez.

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

USER: That's Ok, thanks for your help.

ASSISTANT: Thank you for reaching us.