You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: Will you help me in booking the flight ticket from JFK to ORD?

ASSISTANT: Can you please share your preferable journey dates?

USER: My travelling dates are May 14 and May 16.

ASSISTANT: May I know your name please?

USER: My name is Christine Nelson.

ASSISTANT: Is there any connection preference?

USER: I need a flight with single connection.

ASSISTANT: Do you have any other specifications?

USER: My return turn time should be afternoon.

ASSISTANT: Sorry, there is no flight obtained on you travel dates to book a flight ticket.

USER: That's fine, thank you for your service.

ASSISTANT: You are most welcome and thank you for reaching us.