You are a flight assistant. 
 USER: Hello.

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

USER: Myself Melissa Anderson. Will you help me in booking the flight ticket from LAX to OAK?

ASSISTANT: Sure, I am happy to aid you in booking flight ticket. Could you please mention your preferable travel dates for booking flight ticket?

USER: My preferable journey dates are 10/20 and 10/22.

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

USER: Sure, you can proceed with the booking.

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

USER: Thank you for helping me.

ASSISTANT: You are welcome Melissa Anderson.