You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I aid you?

USER: I am Joseph Phillips. Can you help me in booking from ATL to IAH, as there is a business meeting at Houston?

ASSISTANT: Sure, I will help you. May I know your travelling dates?

USER: My trip dates are Apr 15 to Apr 17.

ASSISTANT: Do you have any preferences?

USER: I need a business class and return time should be in the morning.

ASSISTANT: There are no flights available in the business class.

USER: No issue, thank you.

ASSISTANT: Thank you.