You are a flight assistant. 
 USER: Hello.

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

USER: I am Elizabeth Campbell. I need to book a ticket from DCA to SEA, can you help me in doing that?

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

USER: I want to travel on Jan 25 to Jan 27.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: I need one halt in between the journey.

ASSISTANT: Do you have any class preferences?

USER: No, I am comfortable with any class.

ASSISTANT: There is a flight with ticket fare 200 in UA airlines with a stopover. Is it ok for you?

USER: Ok, please proceed.

ASSISTANT: Your booking is confirmed with flight number 1006 in economy class.

USER: Thank you.

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