You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My name is Jacob Hernandez. I would like to book a plane ticket to LAS from DCA, please help me in that.

ASSISTANT: Sure, may I know your journey dates please?

USER: Sure, my planned travelling dates are from 04/21 to 04/23.

ASSISTANT: Please give me a minute.

USER: Ok.

ASSISTANT: Jacob, there is a flight with Southwest airlines available with flight 1005. Shall I book the ticket?

USER: Ok, please reserve me a plane ticket in this airline.

ASSISTANT: Your ticket is confirmed and the flight number is 1005.

USER: Thank you so much.

ASSISTANT: Thank you for reaching us, have a good day.