You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Andrew Garcia. I want to book a ticket from HOU to DTW to attend seminar, can you help me in booking?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: I am departing on Feb 20 and return on Feb 22.

ASSISTANT: Do you have any particular time for departing and returning?

USER: I want to return in morning time.

ASSISTANT: May I know your other specifications?

USER: I want a flight with connection limit 0.

ASSISTANT: Sorry, no flight is available for you as per your requests.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.