You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to book the flight ticket from IAD to SEA, Can you please help me?

ASSISTANT: Sure. Could you please let me know your name?

USER: Gregory Walker.

ASSISTANT: Thank you. Can I know your travel dates?

USER: My travel dates are Oct 31 and Nov 2.

ASSISTANT: Thank you. Do you have any class preference?

USER: No.

ASSISTANT: Flight-1003 having single connection is available with Southwest airlines and the ticket fare is 100 only in economy class. Flight will take-off at 15:00 hours and arrives at 15:00 hours. Can I book the ticket for you?

USER: Please proceed.

ASSISTANT: Your ticket is booked successfully and have a safe journey.

USER: Thank you for the help.

ASSISTANT: You are most welcome.