You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I'm Kevin Jackson here, and I want to travel from DC-DCA to LAS to attend my brother's marriage.

ASSISTANT: Sure, may I know your travelling dates?

USER: Ok, my dates of travel is from 08/15 to 08/17. Please make sure, that connections limit is 0 and cost is 500.

ASSISTANT: Yes, I found a flight-1003 with Delta airlines, can I proceed?

USER: Ok, please proceed to book my ticket.

ASSISTANT: Yes, your booking is confirmed.

USER: Thank you, for your support.

ASSISTANT: Thank you for contacting us.