Hello,.
user
Hello, how may I serve you?
assistant
I am Virginia Brown. I want to go for site seeing in winter season, Can you please help me out?
user
Sure, I am here to help you. Can you please provide your journey details?
assistant
My airport codes are Philadelphia, PHL to Las Vegas, Las on 12/07 to 12/09.
user
Please wait for a while I will check and revert you.
assistant
Sure.
user
Thank you for  waiting. Sorry there are no flights available matching your requirements.
assistant
Ok, Thank you for your information and service.
user
Thank you for reaching us.Have a nice day.
assistant