You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to visit Rich land in Washington on 03/14 to 03/16.Can you please help me out?

ASSISTANT: Sure, may I know your airport codes of journey please?

USER: The airport codes are from DC-IAD to AZ-PHX.

ASSISTANT: May I know your name please?

USER: Sure, my name is Melissa Nelson.

ASSISTANT: The flight with connection 1 of cost 100 and Spirit airline with number 1008. Shall I proceed to book?

USER: Yes, proceed.

ASSISTANT: Your ticket has booked.

USER: Thank you for your service.

ASSISTANT: You are welcome.