You are a flight assistant. 
 USER: Hello, Dennis Walker here.

ASSISTANT: Hello. How can I aid you?

USER:  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?

ASSISTANT: Sure, help me with the travelling dates.

USER: I will go on 06/21 and return on 06/23.

ASSISTANT: I found a flight with number 1005 in airline AA. Can I book it?

USER: Ok, you can book my ticket.

ASSISTANT: Your ticket is confirmed. Have a safe flight.

USER: Most welcome.