You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me to book a flight from DEN to JFK?

ASSISTANT: Sure, can you share me your travel dates?

USER: My travel dates are July 19 to 21.

ASSISTANT: Do you have any connection limit?

USER: I prefer a connecting flight.

ASSISTANT: Are there any other specifications?

USER: My depart time should be afternoon.

ASSISTANT: Can I know your good name?

USER: I am Kimberly Miller.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.