You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: Would you please help me with booking a flight ticket from DCA to LAS?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: My travelling dates are Dec 11 and Dec 13.

ASSISTANT: Ok, could I have your name please?

USER: I am Joshua Brown.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I prefer to travel in a connecting flight.

ASSISTANT: Ok, do you have any other specifications?

USER: I want to travel in a economy class.

ASSISTANT: The economy class with flight number 1027 of Spirti airline is available having fare as 100 and connection as 1, is it ok for you?

USER: You can proceed with booking.

ASSISTANT: Ok, your reservation is confirmed. The departure time is 14:00 hours and the arrival time is 4:00 hours.

USER: Thank you for your help.

ASSISTANT: You are welcome, have a great day.