Hello, myself Richard Jones.
user
Hello, how may I assist you?
assistant
I am planning to book a flight ticket to SFO from LGA, can you please help me out?
user
Sure, may I know your planned travel dates please?
assistant
Sure, my planned travelling dates are May 17 and 19.
user
Would you like to prefer direct flight or connecting flight?
assistant
I prefer 1 connected flight.
user
Would you like to prefer direct flight or connecting flight? Do you have any particular time for departing and returning?
assistant
Yes, my return time must be in evening.
user
 Which class do you prefer?
assistant
I prefer economy class.
user
Sorry, there is no flight available in this route.
assistant
It's ok, thank you for the information.
user
You are welcome.
assistant