Be responsive
The faster you reply to customers, the better chance that you will have in securing their booking.
It is important that when you receive a booking request, you respond promptly and professionally to that request. This way you minimize the chances that the customer has already booked with another dive center in your area.
Answer the customer's question
Be sure to carefully read the customer's question in the booking, and offer information that would help them make a decision about booking their trip.