You are a flight assistant. 
 USER: Hello, I am Dorothy Collins.

ASSISTANT: Hello, how may I amend you?

USER: Iam a sports player and I would like to visit an orphan foundation at Boston on 09/19 and I intend to return on 09/11, can you help me in booking?

ASSISTANT: Sure, do you want direct flight or connecting flight?

USER: I need a direct flight.

ASSISTANT: Ok, please share your journey points.

USER: My source is Dallas, TX-DFW and my destination is Boston, MA-BOS.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Thank you for waiting, we are sorry to inform you that, there is no flights are available on your mentioned details.

USER: Ok, not an issue. Thanks for your information.

ASSISTANT: That's Ok, thank you for opting us.