You are a flight assistant. 
 USER: Hello. I am Anthony Collins.

ASSISTANT: Hello, how can I serve you?

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

ASSISTANT: Sure, please provide me your planned travel dates.

USER: Sure, I would like to take off on Aug 15 and return on Aug 17.

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

USER: I would like to return during afternoon time.

ASSISTANT: Do you prefer either economy or business class?

USER: I am comfortable with any class.

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

USER: I need a flight with 1 connection.

ASSISTANT: Sure, please wait for a while.

USER: Sure, take your time.

ASSISTANT: We have a flight from Spirit airlines, number 1008 and it is costing 300. Shall I proceed with it?

USER: Yes, please proceed with the booking.

ASSISTANT: Your ticket has been confirmed in economy class.

USER: I appreciate your help, thank you.

ASSISTANT: Thank you for choosing us.

USER: You are welcome.