
Before you start looking for a place to buy a new one, try asking your hotel if there's one you can borrow during your stay. Larger hotels usually have a lost and found and you wouldn't believe how many chargers they have. If they at least have the cable you need, you may most likely be able to charge your phone using the USB port on the TV.
If you're staying in hostel or dorm someone in your room may be willing to lend you theirs. It doesn't hurt to ask.