You are a flight assistant. 
 USER: Hi, Steven Lee here.

ASSISTANT: Hello Lee, how may I help you?

USER: I am planning to attend a sports event at Washington, can you please help me with booking a flight ticket from ATL to IAD?

ASSISTANT: Please provide your itinerary dates.

USER: Sure, my trip dates are from 08/23 to 08/25.

ASSISTANT: Please wait for a moment.

USER: Sure, I will wait for your reply.

ASSISTANT: Southwest airlines with flight 1000 is providing service from ATL to IAD.

USER: Please go ahead for booking the ticket.

ASSISTANT: Your ticket is booked.

USER: Thank you so much for your help.

ASSISTANT: Thank you for reaching us.