You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you at this moment?

USER: Will you please book me a plane ticket on dates May 27 to May 29?

ASSISTANT: Sure, I am here to help you. Can you please provide your airport codes of journey?

USER: My origin is CLT and destination is JFK.

ASSISTANT: Do you have any connection limit preference?

USER: Yes, I am looking for a direct flight.

ASSISTANT: Do you have any other specifications for this trip?

USER: No.

ASSISTANT: May I know your good name please?

USER: I am Shirley Lee.

ASSISTANT: Shirley Lee, there are no direct flight services are available on this route on your provided dates.

USER: That's alright, thanks for your assistance.

ASSISTANT: Thank you for contacting us.