You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please book a flight ticket from DCA to PHL to attend a meeting in Philadelphia?

ASSISTANT: May I know your desired travel dates please?

USER: My journey dates are on June 19th and 21st.

ASSISTANT: Do you have any specifications?

USER: I prefer to travel in economy class. And I need a connection in between journey.

ASSISTANT: May I know your name please?

USER: My name is Daniel Roberts.

ASSISTANT: There is a flight with connection limit 1 and fare 100, shall I proceed for booking?

USER: Ok, proceed.

ASSISTANT: Your ticket is booked, flight number 1002 with Delta Airlines.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us.