You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Thomas Thomas here.

ASSISTANT: How can I help you?

USER: I am looking for a economy class flight for my holiday trip to Chicago. So can you book a flight ticket for me?

ASSISTANT: May I know your desired travel dates please?

USER: The travel dates are from Jan 31 to Feb 02.

ASSISTANT: Can I know your preferred airport codes please?

USER: My airport codes are from DFW to ORD.

ASSISTANT: Do you have any specifications?

USER: No.

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

USER: You can book the flight ticket.

ASSISTANT: Your ticket is booked, flight number 1004 with Jet Blue airlines.

USER: Thank you.

ASSISTANT: Thank you for opting us.