You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. In which way I can help you today?

USER: I need to reserve a ticket from SFO to DCA, can you help me in doing that?

ASSISTANT: Sure, I will help you with that. Can you please mention your preferable travel dates?

USER: My journey dates are Dec 15 to 17.

ASSISTANT: May I know your name for further process?

USER: Jack Perez here.

ASSISTANT: Do you need any specific depart and arrival time for this trip?

USER: No.

ASSISTANT: Do you have any another specifications?

USER: I need a single connecting flight.

ASSISTANT: Ok, please hold on a moment.

USER: Sure, take your time.

ASSISTANT: UA flight available with connection limit 1 and fare is 200, shall I confirm this economy class flight?

USER: Ok, please proceed.

ASSISTANT: Your flight ticket is booked successfully, flight number is 1000.

USER: Thank you.

ASSISTANT: You are welcome Jack Perez.