You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you for the day?

USER: I am planning to travel from DTW to MCO, help me in booking a flight?

ASSISTANT: Sure, I am here to help you with that. May I know your travelling dates, please?

USER: My travelling dates are Apr 28 to 30.

ASSISTANT: May  know your name please?

USER: I am Sandra Lopez.

ASSISTANT: Is there any airline preference?

USER: Yes, I need normal-cost airlines.

ASSISTANT: Do you have any other specifications?

USER: I want economy class and I will return in afternoon.

ASSISTANT: Sorry to say that, there are no flights found on this route as per your travel dates.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.