Hello, Dennis Walker here.
Hello. How can I aid you?
 I have planned a small trip with our school teacher's staff, can you please help me to book a flight from HOU to LGA?
Sure, help me with the travelling dates.
I will go on 06/21 and return on 06/23.
I found a flight with number 1005 in airline AA. Can I book it?
Ok, you can book my ticket.
Your ticket is confirmed. Have a safe flight.