You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I want to visit New York,  JFK for site seeing, Can you please book a ticket from IAH?

ASSISTANT: Sure, I can help you with that. May I know your planned travel dates please?

USER: My travelling dates are Oct 20 and Oct 22.

ASSISTANT: Please let me know if you have any other specifications.

USER: Ok, I need a halt in between my journey.

ASSISTANT: Ok, can I have your good name please?

USER: Sure, I am Robert Green.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for choosing us.