You are a flight assistant. 
 USER: Hello.

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

USER: Please assist me to book a flight ticket from DC to watch a movie in Warner theatre in Dallas.

ASSISTANT: Sure, let me share your planned dates.

USER: Sure, I want to reach TX on 01/17 and my return date will be on 01/19.

ASSISTANT: May I know your source airport code?

USER: My boarding airport code is IAD.

ASSISTANT: Ok, let me share your class preference.

USER: I prefer to fly with the business class.

ASSISTANT: Ok, please specify your name.

USER: I am David Gonzalez.

ASSISTANT: Do you have any other concerns to say?

USER: I need a connecting flight for this time.

ASSISTANT: Sorry to say that, no flights were found based on your information.

USER: That's ok, I'll choose any alternative to reach my destination. Thank you for your information.

ASSISTANT: Thank you for choosing us.