You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Carol Collins here. I want to travel from JFK to LAS for attending a seminar. Can you please help me for booking the flight ticket?

ASSISTANT: Ok, can you please mention your travelling dates?

USER: My travelling dates are from 11/23 to 11/25. Make sure my price limit is 500.

ASSISTANT: Sorry, no flights found on your preferable dates.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching us.