You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am police and I have to attend HOU to train the people, is there any flight available from my region DTW?

ASSISTANT: Ok, please share your travelling dates?

USER: I would like to move on 04/02 and return back on 04/04.

ASSISTANT: Ok, may I know your name?

USER: Sure, my name is Ronald Brown.

ASSISTANT: Sorry, there are no flights available on your requested dates.

USER: Ok, it's alright, thank you for your immediate response.

ASSISTANT: Thank you for reaching us.