You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: Myself Dorothy Edwards, I need you to book a flight ticket form SEA to IAD.

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: October 19 and 21 are my travel dates.

ASSISTANT: The economy class with flight number 1004 is available, is it ok for you?

USER: Please make sure that the flight departs in the afternoon.

ASSISTANT: The Spirit airline with flight number 1020 is available, is it ok for you?

USER: If it is a connecting flight please book the ticket.

ASSISTANT: Ok, your reservation is confirmed.

USER: Thank you for the help.

ASSISTANT: You are welcome, have a great day.