You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you?

USER: I am planning to book a ticket from PHL to DEN to attend seminar, can you help me in booking?

ASSISTANT: Sure, may I know your travel dates please?

USER: I am departing on Dec 17 and return on Dec 19.

ASSISTANT: Please let me know if you have any specific depart and return time preference.

USER: I am ok with any time.

ASSISTANT: Do you prefer either economy or business class?

USER: I need a economy class flight.

ASSISTANT: Please let me know if you have any other preference.

USER: I want a flight with connection limit 1.

ASSISTANT: May I know your name please?

USER: My name is Brain Turner.

ASSISTANT: We have a flight from Delta airlines, number 1010 and the price is 100. Shall I proceed with it?

USER: Please proceed for booking.

ASSISTANT: Your ticket has been confirmed in economy class.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us.