You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: My name is Charles Brown.

ASSISTANT: How can I help you today?

USER: I would like to attend a concert at Washington-DC, could you please help me to book my flight ticket from LAS to DCA?

ASSISTANT: I am ready to help you with that booking. Please share me your travelling dates.

USER: Sure, I will depart on 04/13 and return back on 04/15.

ASSISTANT: Just give a moment .

USER: Sure.

ASSISTANT: The flight is found with AA airline having one connection and airfare is 200. Shall I proceed with booking?

USER: Yes, I am comfortable with this flight. You can book the ticket for me.

ASSISTANT: Your ticket is confirmed with the flight number 1021.

USER: Thank you very much for your help.

ASSISTANT: Thank you for reaching us. Have a safe journey.