You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Stephen Gonzalez.

ASSISTANT: Stephen, how can I assist you today?

USER: I want to visit Washington-DC, can you please help me to book my flight ticket from DFW to IAD?

ASSISTANT: Please can I know your travelling dates?

USER: I will depart on 11/28 and return on 11/30.

ASSISTANT: Flight 1000 of Delta airlines is available for you.

USER: That's fine for me, you can proceed for booking the ticket.

ASSISTANT: Your ticket is booked with price 100.

USER: Thank you very much for your help.

ASSISTANT: Thank you for contacting us.