You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Jason Allen.

ASSISTANT: How can I help you?

USER: Can you please help me in booking my flight ticket from IAD to LAS?

ASSISTANT: Sure, May I know your travel dates?

USER: My travelling dates are Aug 19 and Aug 21.

ASSISTANT: Do you have any preferences?

USER: I need my return ticket at afternoon time.

ASSISTANT:  Do you have any other preferences?

USER: I need connecting flight.

ASSISTANT: Please wait for a while.

USER: Ok, I will wait for your reply.

ASSISTANT: Delta airlines is providing the flight-1006 with single connection and the flight fare is 100. Can I proceed?

USER: Ok, please proceed with booking.

ASSISTANT: Your booking is confirmed.

USER: Thank you for your help.