You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: I am looking for a flight from Denver to attend a meeting at Phoenix. Can you book a flight for me?

ASSISTANT: Surely, I will help you out. Do you prefer a connecting flight or a direct flight?

USER: I prefer a connecting flight.

ASSISTANT: On what dates, you have planned to travel?

USER: I will travel on Sept 22 and return on Sept 24.

ASSISTANT: Ok, help me with your class preference.

USER: I am fine with any class.

ASSISTANT: Can I have your name please?

USER: My name is Michael Martinez.

ASSISTANT: Is there any other concerns to say?

USER: No.

ASSISTANT: Sorry to say that, no flights are found based on your information.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for choosing us.