Hello, Micheal Collins here.
user
Hello, how can I help you today?
assistant
I want to book my flight ticket from Los Angeles to San Francisco.
user
Sure, can you please share your journey dates?
assistant
My planned trip dates are May 18-20.
user
Do you have any connection limit?
assistant
No, I am comfortable with any connection.
user
Do you have any class preference?
assistant
No.
user
Ok, any other requirements to be met?
assistant
I want to depart  in the evening.
user
Sorry, there are no flights found with your given details.
assistant
Ok, no issues. Thanks for your information.
user
Thank you for reaching us.
assistant