Hello.
user
Hello, how can I assist you?
assistant
I am Benjamin Nelson. Can you please help me in searching a flight from Houston city to Los Angeles?
user
  Sure, I will help you in booking the ticket. May I know your travelling dates please?
assistant
Thank you for accepting my request. My preferred travel dates are Dec 10 and Dec 12.
user
Do you have any class preference?
assistant
I am ok with any type of class.
user
Ok, please wait.
assistant
Ok, please make sure that the price limit is 200 or less.
user
 Sorry to inform you that no flights were available on your travel dates. Thank you for availing us.
assistant