Hi, I am Katherine Scott.
user
Hello, how can I assist you at this moment?
assistant
I would like to attend a music event at Los Angeles, can you help me to book a flight ticket from IAH to LAX?
user
Sure, I will help you with this. Can you please provide your journey dates?
assistant
I am travelling from Aug 16 to Aug 18.
user
Do you need any halt in this journey?
assistant
I need a direct flight.
user
Do you have any class preference for this trip?
assistant
I prefer business class.
user
Do you have any specific  depart and arrival time for this trip?
assistant
No, I don't have any specific time for this trip.
user
Katherine Scott, there are no flight services available with your preferences on this route.
assistant
No problem, thank you for the information.
user
Thank you for choosing us.
assistant