You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Virginia Green here.

ASSISTANT: How can I assist you at this moment?

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

ASSISTANT: Sure, I can aid you in booking flight ticket. Can you please mention your preferable travel dates?

USER: My travelling dates are from 08/12 to 08/14.

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

USER: Ok, I will wait.

ASSISTANT: Sorry no flights available as per your requested dates.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching us.