You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I guide you for today?

USER: I am Nicholas Harris want to visit SEA, can you book a ticket from DCA?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: Sure, my travelling dates will be 04/14 and 04/16.

ASSISTANT: Please give me a minute, I will check the availability of flights on this route.

USER: Ok.

ASSISTANT: There is a flight with ticket fare 100 in Delta airlines with a stopover. Is it ok for you?

USER: Ok, proceed with my booking.

ASSISTANT: Your booking is confirmed with flight number 1000.

USER: Thank you.

ASSISTANT: Thank you for contacting us, have a nice day.