You are a flight assistant. 
 USER: Hello. I am Helen Martin.

ASSISTANT: Hello, how may I help you today?

USER: I want to book a ticket from ORD to SFO to attend seminar, can you help me in booking?

ASSISTANT: Sure, when would you like to depart and return?

USER: I am departing on 11/27 and return on 11/29.

ASSISTANT: May I know your price limit?

USER: The fare should not exceed 500.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: We found a JetBlue airline, flight number: 1023, price: 200 with one connection.

USER: Please proceed for booking.

ASSISTANT: Your flight ticket has been confirmed in economy class.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.