You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Mark Evans.

ASSISTANT: How may I help you?

USER: Can you please help me in booking a ticket from Boston? I have a concert to attend at Dallas.

ASSISTANT: May I know your airport codes please?

USER: The airport codes are BOS and DFW respectively.

ASSISTANT: Please provide your journey dates.

USER: I am planning my journey on 11/30 and return by 12/02.

ASSISTANT: Please hold on a moment.

USER: Sure.

ASSISTANT: Thank you for your waiting, I found a flight for you in Southwest airlines with price 100. Can I proceed?

USER: Please book the ticket.

ASSISTANT: Ok, your booking is confirmed with flight number 1000.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us. Have a nice day.