Hello.
user
Hello, how may  I assist you?
assistant
I have to attend my brother's marriage in Chicago, can you please help me to book my flight ticket from DFW to ORD?
user
Sure, I will help you out. Please provide me your travel dates?
assistant
I want to depart on 12/13 and return back from ORD on 12/15.
user
Please wait a moment. May I know your name?
assistant
Sure. My name is Anthony Hill.
user
Sorry Hill, no flights are available in your route.
assistant
No problem, thank you for checking.
user
Thank you for reaching us.
assistant