Traveling to the USA! 🇺🇸 [B1-B2] Advanced tourism situations!

If your flight to JFK airport is cancelled, and you want to get on the next available flight, what can you say?

Could you please put me on the next available flight?

You are in a taxi and the driver is taking a very long route. You should say:

You booked a hotel but they gave you a room with two single beds instead of a double. You should say:

There seems to be a mistake, I booked a double room

A local recommends a "hole in the wall" restaurant, what does this mean?

A small, good local restaurant with great food

If you see a sign that says "Mind the gap", where are you?