You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Margaret Harris.

ASSISTANT: How can I aid you now?

USER: I am planning to attend music concert at IAD, can you please help me with booking a flight ticket from BOS?

ASSISTANT: Sure, may I know your travel dates?

USER: Sure, I would like to take off on Dec 5 and return on Dec 7.

ASSISTANT: Do you have any connection limit?

USER: I need a flight with 1 connection.

ASSISTANT: May I know about your class preference?

USER: I prefer economy class.

ASSISTANT: May I know your depart and arrival timings?

USER: I would like to depart during evening time.

ASSISTANT: Let me know your airline preference.

USER: I am ok with any airline.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your time.

ASSISTANT: Delta airlines is providng you the connecting flight in economy class, depart time is at 21:00 PM and arrival is at 1:00 AM. Shall I proceed?

USER: Yes, please proceed with the booking.

ASSISTANT: Your ticket has been reserved with flight-1028.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.

USER: You are welcome.