You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: Steven Hernandez here. Could you please help me in booking a ticket from OAK to IAD?

ASSISTANT: Sure, can I know your preferable dates?

USER: Ok, here are my travelling dates 03/18 and 03/20.

ASSISTANT: I found a flight 1004 of Southwest airlines matches with your preferences, can I proceed?

USER: Yes, please book my ticket.

ASSISTANT: Your ticket is booked.

USER: Thank you for the help.

ASSISTANT: Thank you, have a good day.