You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am planning to attend a Tennis competition in Washington DCA to Detroit DTW. Can you find a flight ticket for me?

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

USER: Ok, my itinerary dates are on Jan 23 and return Jan 25.

ASSISTANT: Can you please share your source and destination airport again?

USER: Sorry, I want to start my journey from DTW to DCA.

ASSISTANT: Ok, may I know your connection connection limit?

USER: Yes, I need a single connecting flight.

ASSISTANT: Do you prefer either economy or business class?

USER: Yes, I want an economy class.

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

USER: Sorry, I don't have any time preferences.

ASSISTANT: Do you prefer any specific airline?

USER: No.

ASSISTANT: May I know your name please?

USER: Ok, my name is Alexander Clark.

ASSISTANT: We have a flight from United airlines, number 1000 and the price is 100. Shall I proceed with the booking?

USER: Ok, you can proceed with the ticket booking.

ASSISTANT: Your economy class seat is reserved with a connecting flight.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us.