You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you at this moment?

USER: Would you please book my ticket from JFK to ORD?

ASSISTANT: Sure, I will help you in booking flight ticket.

USER: Thanks.

ASSISTANT: Can you please mention your travel dates for booking flight ticket?

USER: My travelling dates are from 08/20 to 08/22.

ASSISTANT: May I know your name for further process?

USER: Myself Deborah Hill.

ASSISTANT: Please hold on a moment, I will check flight availability in this route.

USER: Sure.

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

USER: It's ok, thanks.

ASSISTANT: Thank you for contacting us, have a nice day.