You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, could you please tell me for what help you choose us?

USER: For booking a flight ticket.

ASSISTANT: Ok, may I know from which location you need booking?

USER: I am travelling from Denver DEN airport.

ASSISTANT: Ok, may I know your travelling dates?

USER: I am departing on 09/09 and return on 09/11.

ASSISTANT: Ok, please tell me your destination airport code.

USER: I want to land in Detroit-DTW airport.

ASSISTANT: Ok, may I know your name please?

USER: My name is Stephanie Carter.

ASSISTANT: The delta airline with flight number 1000 is available having price as 200 and connection as 0. Would you like me to book this plane ticket?

USER: No, I want a flight with 1 connection. Please check is there any flight available or not.

ASSISTANT: Sorry, no flights found as per your request.

USER: That's fine, I will check for other alternative.

ASSISTANT: Ok.

USER: Anyway, thanks for your information.

ASSISTANT: Thank you for reaching us.