You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you for the day?

USER: My name is Margaret Davis. I want to book a flight ticket from DC - IAD to CA - OAK to meet my friend. Could you please help me in booking a flight ticket?

ASSISTANT: Sure, we are glad to help you.

USER: Thank you.

ASSISTANT: Can you please let me know your journey dates?

USER: Sure, my journey dates are from 11/21 to 11/23.

ASSISTANT: How much you can spend for airfare?

USER: I can afford up to 500.

ASSISTANT: We found a Southwest airlines, flight number 1010 and the fare of 200. Shall I proceed?

USER: Please proceed.

ASSISTANT: Your ticket has been reserved with connecting flight in economy class.

USER: Thank you for booking.

ASSISTANT: Thank you for reaching us.