You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: My name is Mark Miller. I would like to travel from PHX to DCA, could you help me out?

ASSISTANT: Sure, can you share your trip dates?

USER: My preferable dates are from 11/09 to 11/11.

ASSISTANT: Do you have any specifications?

USER: No.

ASSISTANT: There is a connecting flight with number 1006 in airline Southwest, the fare is 100.

USER: Please proceed with the booking.

ASSISTANT: Your ticket is reserved.

USER: Thank you for your time.

ASSISTANT: Thank you for reaching us.