Hello.
user
Hello. How can I assist you today?
assistant
Can you  please book a flight ticket from SFO to LAS?
user
Sure, will you mention your travelling dates please?
assistant
Thank you. I have  planned my travel  dates as  Apr 14 and Apr 16.
user
Do you have any preferences about flight connections?
assistant
I am looking for direct flight.
user
Do you have any preferences about class?
assistant
No but I would like to depart in afternoon time so please make sure that.
user
Please mention your name.
assistant
Sure, myself Steven Williams.
user
There is no flights found under your preferable details.
assistant
Oh! It is sad to hear. Anyway, thank you for your  time.
user
Welcome, have a great day.
assistant