Some English phrases that you might use when traveling:

At the airport:

"Where is the check-in counter?"
"What time does my flight depart?"
"Is there a baggage weight limit?"
"Where can I find the departure gate for my flight?"
On the plane:

"Could I have a blanket, please?"
"What's for meal options?"
"Could I have some water, please?"
"How long is the flight?"
At the hotel:

"Do you have any available rooms for tonight?"
"Could you recommend a good restaurant nearby?"
"What time is check-out?"
"Is breakfast included in the room rate?"
In a restaurant:

"Could we see the menu, please?"
"I'd like to make a reservation for two."
"Could we have the bill, please?"
"Is service charge included?"
In a taxi or transportation:

"Could you take me to [destination]?"
"How much does it cost to get to the city center?"
"Could you turn on the air conditioning, please?"
"Could you please slow down?"
Asking for directions:

"Excuse me, could you tell me how to get to [place]?"
"Is it far from here?"
"Could you write it down, please?"
General phrases:

"Excuse me, where is the nearest restroom?"
"Could you help me, please?"
"I'm lost. Can you help me find my way back to [place]?"