You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Melissa Nelson.

ASSISTANT: What can I do for you?

USER: I need to attend an event in IAD. Can you book a ticket from ORD?

ASSISTANT: Good Nelson, what are your trip dates?

USER: My travel dates are from 10/19 to 10/21.

ASSISTANT: There is a flight with Southwest providing to your landing region , can I proceed for reservation?

USER: Please book the ticket.

ASSISTANT: Nelson, your ticket has confirmed with flight number 1016,have a happy flight journey.

USER: Thank you for your help.

ASSISTANT: Thank your for your time in reaching us.