You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am looking for a flight from HOU to DTW, can you help me in booking?

ASSISTANT: Sure, let me know your trip dates please?

USER: Sure, my planned travel dates are Aug 05 and Aug 07.

ASSISTANT: May I know your connection limit?

USER: Please look for a connecting flight.

ASSISTANT: Do you need any other preference?

USER: I would like to return my journey for the evening flight.

ASSISTANT: Can I know your name please?

USER: Myself Charles Nelson.

ASSISTANT: Sorry to inform you that there are no flight services available on your given details.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for contacting us.