You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Can you please help me to find a flight from DFW to ORD please?

ASSISTANT: Sure, I am happy to help you. Can I have your trip dates?

USER: My journey dates are from June 22 to June 24.

ASSISTANT: Do you have any break in between journey?

USER: Yes, I need 1 connection flight.

ASSISTANT: May I know your class preference?

USER: I need a flight with business class.

ASSISTANT: Please provide your good name.

USER: My name is Michael Perez.

ASSISTANT: We are regret to inform you that, no flights are available on your specifications.

USER: Oh! That's fine, thank you for checking.

ASSISTANT: Thank you for opting us.

USER: Most welcome.