You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to taste Various and understand Cooking methods at PHL. So can you please help me in booking a flight ticket from DCA?

ASSISTANT: Sure, can you share your trip dates?

USER: My journey dates are from June 06 to June 08.

ASSISTANT: Do you have any preferences?

USER: I prefer normal cost airlines.

ASSISTANT: May I know your name?

USER: My name is David Clark.

ASSISTANT: There is a connecting flight with number 1005 in airline UA, the fare is 100 in economy class. Can I book it?

USER: Sure, you can proceed for booking.

ASSISTANT: Your ticket is reserved, the depart time is 20:00 PM and return time is 15:00 PM.

USER: Thanks for your help.

ASSISTANT: Thank you for opting us.