You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I need buy a plane ticket from DCA to SEA. Can you help me?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: I will start on Dec 9th and return on Dec 11th.

ASSISTANT: Can I know your name please?

USER: I am Samuel Young.

ASSISTANT: Do you need any specifications?

USER: No.

ASSISTANT: Can I know your other preferences?

USER: I am fine with above essentials.

ASSISTANT: There is a flight with connection 1 and price 200, can I proceed?

USER: Fine, please proceed.

ASSISTANT: Ok, your ticket has been booked with flight number 1026.

USER: Thanks for your support.

ASSISTANT: Thank you for reaching us.