To book a trip, you need to confirm Tour Information and make a payment. First, at the top right of a chat, you can open Tour Information to check trip's date, time, meeting location, and these kinds of things. If there is something seemingly wrong, you may ask the guide to review the Tour Information. If not, confirm the Tour Information and make a payment through PayPal. PayPal will not ask your phone number and address in case of emergency, so all you need is a credit card to pay safely through PayPal.