You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I want to book a flight from CLT to JFK. Can you please make a reservation for me?

ASSISTANT: Sure, I am glad to help you with that. Can I know your planned trip dates?

USER: Sure, I want to depart on Apr 25 and need to return on Apr 27.

ASSISTANT: Is there any other requirements? May I know your good name?

USER: Yes, I need a connecting flight with an economy class. Patricia Jones here.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Sorry to say that, there are no flights available based on your journey dates.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for checking.