You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am planning to visit Charlotte, NC-CLT. Can you please help me for booking the flight ticket from Chicago?

ASSISTANT: Could you please provide the travel dates?

USER: My departure date is 06/23 and the return date is 06/25.

ASSISTANT: Can I Know the source code please?

USER: The source code is from IL-ORD.

ASSISTANT: May I know your name please?

USER: Sure, my name is Jonathan Hernandez.

ASSISTANT: Sorry Hernandez, there are no flights on your dates.

USER: No problem, I will search another way to complete my trip.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your service.