Hi.
user
 Hello, how may I oblige you today?
assistant
Can you please book a flight ticket from SFO to PHL?
user
Sure, can you please share your journey dates that you prefer to travel?
assistant
My travelling dates are Nov 21 and Nov 23.
user
Do you require any stopovers in your journey?
assistant
Yes, I need a connecting flight.
user
May I know your departure time and arrival time?
assistant
I am comfortable to travel at any time.
user
Do you have any other requirements?
assistant
I want a ticket in business class.
user
May I know your name?
assistant
     My name is Mary Lee.
user
Sorry to inform you that unfortunately there is no flights available by the given details.
assistant
That's ok, thank you for the response.
user
Thank you.
assistant