You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you at this pleasant evening?

USER: We are totally 5 sisters among them my 3rd sister birthday is on 02/15.So we are planning to do grand party in Las Vegas, can you please search a flight ticket for me?

ASSISTANT: Sure, can you please provide your source and destination airport codes?

USER: I want to start my journey from MI-DTW airport and I need to reach NV-LAS airport.

ASSISTANT: May I know your preferable dates to travel?

USER: I want to start my journey one day before of my sister birthday party event, so my travel date is 02/14 and my return date is 02/16.

ASSISTANT: Please wait for a minute, I will check and revert  you.

USER: Ok.

ASSISTANT: There is no flight available on your requested dates in this route. Sorry for the inconvenience.

USER: Ok, fine not an issue.I will search other way to complete my trip.

ASSISTANT: May I know your good name please?

USER: Myself Katherine Baker.

ASSISTANT: Thank you.

USER: Thank you for your help.