Hello
Hello, how can I help?
Yes i would like help in finding a flight from Detroit to Pittsburgh and booking it with id 86
On what day do you want the plane to arrive?
On Sunday
Unfortunately there are no flights that match your search. Would you like to change any of your criteria?
I need to book an flight because i need to get to my sons. He;s graduating, So do you have any flights for Friday?
May I have your name, please?
John 
Sorry, but the flight with id '86' is not available any more.
Could you please tell me what the weather is like in Chicago right now
For what day would you like the weather forecast?
today
It will be Raining all day on Wednesday in Chicago, with temperatures of around 23 degrees celsius.
Thanks for that info. Is it any way i can get a flight out Monday? Really trying to get to my son?
Flight 998 with Delta Airlines is available on Monday, should I book this for you?
Okay, yes please
I'm sorry, but your reservation request was unsuccessful.
I thought you said it was available for booking? 
Right, your flight is now reserved!
okay, great! thank you for your help today
Thank you and goodbye.