You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: I am Patrick Nelson.

ASSISTANT: How can I render you today?

USER: I need to book a flight ticket from Las Vegas, NV-LAS to Washington, DC-DCA to meet my uncle.

ASSISTANT: OK.

USER: Could you please help me with reserving a flight ticket?

ASSISTANT: Sure, May I know your travelling dates?

USER: 05/04 and 05/06 are my travelling dates.

ASSISTANT: Do you have any requirements?

USER: I need a stop over in between the journey.

ASSISTANT: Thank you for being patience, there is a flight available with Southwest airline, flight number 1022 with fare 100 and a lay by. Shall I proceed to book?

USER: Yes, please proceed with booking.

ASSISTANT: Your booking has been done. Thank you for reaching us.

USER: Thank you for your help.