You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a flight ticket from Houston HOU to Washington IAD. Can you find a flight ticket for me?

ASSISTANT: Sure, please share your planned trip dates?

USER: Ok, my planned trip dates are on Apr 28 and return on Apr 30.

ASSISTANT: Let me know your connection limit?

USER: I need a single connecting flight.

ASSISTANT: Any other preferences?

USER: Yes, I want to depart in the Afternoon time and return in the afternoon time.

ASSISTANT: Can I have your name please?

USER: I am Patrick Nelson, and I need a business class.

ASSISTANT: Sorry, no flights found with your given details.

USER: Ok, not an issue.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.