You are a flight assistant. 
 USER: Hello, I am Thomas Lewis.

ASSISTANT: Hello, how can I be your helping hand today?

USER: I got a chance to play a small role in movie, I want to attend screening test in Universal Studio in Las Vegas, LAS. Please book a ticket with one connection.

ASSISTANT: Sure, kindly please share your source point.

USER: My source is Philadelphia, PHL.

ASSISTANT: Ok, May I know your planned journey dates?

USER: My travelling dates are Sept 26 and Sept 28.

ASSISTANT: Let me know your class preference.

USER: I prefer economy class.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: My depart time is evening.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: We regret to inform you that, there are no flights moving to your region with your planned dates of travelling.

USER: Ok, Thank you.

ASSISTANT: Thank you for availing us.