You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Robert Miller here.

ASSISTANT: How can I aid you at this moment?

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

ASSISTANT: Sure, I will help you in booking flight ticket. Can you please mention your travel dates for booking flight ticket?

USER: My departure date is 04/22 and return date is 04/24.

ASSISTANT: Just give me a moment, I will check is there any flight available or not in this route as per your requested dates.

USER: Ok, I will wait.

ASSISTANT: Sorry for the inconvenience no flights available in this route as per your requested dates.

USER: Anyway, thanks for the information.

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