You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Is this a flight booking agency services?

ASSISTANT: Yes, what help is required from our agency?

USER: My brother is planning to visit New York NY-JFK, he did not know how to book the flight ticket. Can you please help him to book the flight ticket from Chicago?

ASSISTANT: Sure, I will help you with that.

USER: Thank you for your positive response.

ASSISTANT: Could you provide the take off code please?

USER: His native place is Chicago. So he want to start from Chicago, IL-ORD.

ASSISTANT: Can you share the dates of travel please?

USER: He want to stay in New York on 02/23. So his start date is 02/20 and the return date is 02/22.

ASSISTANT: Give me a moment please, I will get back to you with best flight details.

USER: Sure, please book the ticket on the name of Carolyn Rodriguez.

ASSISTANT: Sorry for inconvenience, there are no flights available as per your request.

USER: Not an issue, I will search for another resource to reach his destination.

ASSISTANT: Thank you for choosing our agency.

USER: Anyway I appreciate your help, thank you.

ASSISTANT: Welcome.