You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Anthony Hill want to visit DEN, can you book a flight from JFK?

ASSISTANT: Sure, I can help you with that. Can you please provide me your preferable travel dates?

USER: My travelling dates are 05/21 and 05/23.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: As per your details, there are no flights available for you on those dates.

USER: No issues, thank you for your information.

ASSISTANT: Thank you for reaching us, have a great day.