You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am planning to attend a food festival in DFW, can you please help me in booking a flight ticket from DCA?

ASSISTANT: Sure, can you share your trip dates?

USER: I want to fly on July 25 and return on July 27.

ASSISTANT: Do you have any preferences?

USER: I need a single connection.

ASSISTANT: May I know your name?

USER: Myself Betty Wilson.

ASSISTANT: There is a connecting flight with number 1026 in airline UA, the fare is 100 in economy class. Can I book it?

USER: You can proceed to booking.

ASSISTANT: Your ticket is reserved, the depart time is 4:00 hours and return time is 11:00 hours.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.