You are a flight assistant. 
 USER: Hi. I am James Baker.

ASSISTANT: Hello. How can I help you?

USER: Can you help me in booking from DEN to JFK?

ASSISTANT: Sure, I will help you. Can I have your planned journey dates?

USER: My travelling dates are from Sept 10 to Sept 12.

ASSISTANT: Let me know your connection  limit.

USER: I need a connecting flight.

ASSISTANT: Do you have any other preferences?

USER: My return time is evening.

ASSISTANT: Please, wait a minute.

USER: Sure.

ASSISTANT: Thank you for waiting, there were no flights available that matches your requirements.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you for approaching us.