You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you please book a ticket from DCA to LAS to go for long trips?

ASSISTANT: Can you please help me with your travelling dates?

USER: My travelling dates are Oct 14 and Oct 16.

ASSISTANT: Please mention your good name?

USER: Sure, I am Mark Wright.

ASSISTANT: Is there any connection limit?

USER: I would like to travel in single connected flight.

ASSISTANT: Is there any other requirements?

USER: I prefer economy class.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: Delta Airlines providing direct flight in the economy class with fare 100, can I proceed for booking?

USER: Ok, please proceed.

ASSISTANT: Your ticket is confirmed with flight number 1006.

USER: Thank you.

ASSISTANT: Thank you for reaching us.