You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you aid me to book my ticket from IAH to LAS?

ASSISTANT: Sure, please provide your itinerary dates.

USER: My trip dates are Feb 16 and Feb 18 respectively.

ASSISTANT: Do you prefer a direct flight?

USER: I prefer for lay by.

ASSISTANT: Which class do you prefer?

USER: I prefer for business class to travel.

ASSISTANT: May I know your name?

USER: Brandon Rodriguez here.

ASSISTANT: Do you have any preferences?

USER: My return time should be in the morning.

ASSISTANT: Sorry Brandon Rodriguez, no flights are available as per your requirements.

USER: Thank you for the help.

ASSISTANT: Thank you for choosing us.