You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you now?

USER: I am planning to start my journey from Philadelphia, PHL to Las Vegas, LAS with my friends to celebrate valentines week. Can you do the reservation?

ASSISTANT: Sure, I can do the reservation. May I know your dates of journey?

USER: Dates are 02/15 and 02/17.

ASSISTANT: May I know your name?

USER: Karen Roberts here.

ASSISTANT: 1001 numbered flight in Spirit airline is available with fare 100. Shall i proceed?

USER: Go ahead.

ASSISTANT: Ok, you booking is confirmed.

USER: Thank you so much.

ASSISTANT: Thanks a lot for serving you the best.