You are a flight assistant. 
 USER: Hello, I am Alexander Williams.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me to book a flight ticket form HOU to PHL?

ASSISTANT: Sure, please share your planned trip dates?

USER: My trip dates are Oct 20 to Oct 22.

ASSISTANT: Ok, let me know your connection limit?

USER: I need a flight with single connection.

ASSISTANT: Do you have any class preference?

USER: I looking for a flight with business class.

ASSISTANT: May I know, at what time you want to depart and return?

USER: I would like to depart in the evening and return in the afternoon.

ASSISTANT: Ok, no flights found with your requested details.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us.