You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am Catherine Wright from Washington.

ASSISTANT: Nice meeting you Catherine.

USER: I want to visit Oakland next week, can you please book a flight ticket for me?

ASSISTANT: Sure, I am glad to help you with that. Can you please provide your preferable dates of travelling?

USER: Thank you, I want to take off on 03/19 and confirm my return ticket also on 03/21.

ASSISTANT: Ok, may I know your origin and destination airport codes for booking?

USER: I would like to fly from DCA and destination airport is OAK.

ASSISTANT: Please wait a moment to check the flights availability.

USER: Ok.

ASSISTANT: Based on your information, UA airline is ready to serve you with 1 connection with a minimum fare of 200 is available for you. Shall I proceed with this?

USER: That's great, please confirm this flight ticket for me.

ASSISTANT: Ok, your ticket has been booked in flight number 1004.

USER: Thank you for your help.

ASSISTANT: Thank you for approaching us, have a great journey.