You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,.

USER: I am Joseph White.

ASSISTANT: How can I serve you today?

USER: I need a flight from IAD to DTW.

ASSISTANT: Ok.

USER: Can you book a flight ticket to me?

ASSISTANT: Sure, I will help you in booking. May I know when are you willing to travel?

USER: I want to celebrate my birthday with my cousin on 01/20. So, please book my return ticket on 01/22.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a connecting flight.

ASSISTANT: There is flight found that matches your request.

USER: That's great. please let me know the details of flight.

ASSISTANT: There is a connecting flight with Delta as airline with price of 100. May I book your reservation?

USER: Okay, please go on for confirming the ticket.

ASSISTANT: Confirmation of your ticket has been reserved for 1020 as flight number.

USER: Thank you for reserving my ticket.

ASSISTANT: Thank you for opting us.