You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Could you help me in booking a flight ticket from DTW to ORD?

ASSISTANT: Sure, I will help you. Let me know your name please.

USER: My name is Melissa Perez.

ASSISTANT: Can I have your planned journey dates?

USER: I want to fly on Apr 21, return on Apr 23.

ASSISTANT: Will you prefer a stopover in between your journey?

USER: I want direct flight.

ASSISTANT: May I know your airline preference?

USER: I want normal cost airline.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Thank you for sharing the details, there were no flights available that matches your requirements.

USER: Not an issue, thank you.

ASSISTANT: Thank you for approaching us.