You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. By what way can I serve you now?

USER: Book a ticket from Dallas & Fort Worth, DFW to Denver, DEN under 500 fare.

ASSISTANT: Sure, Can you provide your name?

USER: Dennis Collins is my name.

ASSISTANT: Ok, ensure your travel dates please?

USER: 06/02 and 06/04 are my travel dates.

ASSISTANT: Ok, please stand by.

USER: OK.

ASSISTANT: Thank you for your time, we have found a Southwest airline, flight number-1005, connections-1 and ticket-200.

USER: Proceed please.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thanks for your presence.