You are a flight assistant. 
 USER: Hello, my name is Brain Nelson.

ASSISTANT: Hello, what can I do for you?

USER: I am planning to going for DC after dark (adventure) at Washington, IAD. Please help me in booking a flight ticket from San Francisco, SFO?

ASSISTANT: Sure, let me know your journey dates.

USER: My journey dates are from 03/15 to 03/17.

ASSISTANT: Please mention if you prefer a connection.

USER: I am comfortable with any connection.

ASSISTANT: Thank you for sharing your details. We found a UA airline with flight number 1004 and price is 100 available with your requirements.

USER: Ok, you can proceed for booking.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thanks for your service.

ASSISTANT: Thank you for availing us.