You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Please book a flight ticket from SEA to IAD?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: I want to travel from Aug 31st to Sept 2nd.

ASSISTANT: Can I know your name?

USER: Eric Green here.

ASSISTANT: Are you fine with connecting flight?

USER: Yes.

ASSISTANT: May I know your requirements?

USER: I don't have any other requirement.

ASSISTANT: There is a economy class flight 1007 of American Airlines, can I proceed?

USER: Yes, proceed.

ASSISTANT: Your booking is done.

USER: Thank you for your help.

ASSISTANT: Welcome.