You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I would like to change my reservation as I am leaving for delegates meet, can you please help me out?

ASSISTANT: Sure, I am gleeful to help you with that. May I know your name please?

USER: Check the reservation on the name Barbara Collins.

ASSISTANT: Please wait for a while.

USER: I need single connected flight.

ASSISTANT: Thank you for waiting. There is no active reservation found on your name in our database to change it.

USER: Ok no problem, I thought if my reservation found. I prefer single connected flight. Anyway thank you for checking.

ASSISTANT: Most welcome, thank you for reaching us.