You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to book a flight ticket from MSP to HOU, can you please help me?

ASSISTANT: Sure, may I know your trip dates please?

USER: My planned trip dates are June 11 and June 13 respectively.

ASSISTANT: Ok, do you have any other requirements?

USER: Yes, I am looking for a connecting flight. And I prefer afternoon flight for my return journey.

ASSISTANT: Can I know your name please?

USER: Myself Benjamin Robinson, ensure to look for a economy class.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

USER: That's fine, no issue. Anyway thank you for checking.

ASSISTANT: My pleasure.