Translation of useful in Spanish

We bought a Sandwich and were looking for a taxi, but the streets were so crowded that we had to wait nearly one hour to find a cab. We even had to walk a few blocks in order to catch one.
Hi! Thank you for your invitation and for your very kind messages. I'm sorry but it is very late here and I prefer to write you tomorrow. When is the best time to chat? See you later than.
The road was a really horrible, but the lakes and the surrounding woods were colorful and impressive. We drove for two hours through the forest towards San Martin de los Andes, but decided to turn back before it got dark.