I am sure you will face this situation before when you are looking for something in a huge superstore in your country and you can't find it. Learn this english conversation, in case you nee them when you travel abroad.
Example 1
You : Excuse me. I'm looking for a book called "ABC"?
Mr.A : Ok sir. The book corner is right over there.
You : Thank you.
A : You are welcome.
Example 2
You : Excuse me. Do you know where is the book department?
Mr.A : Sure. Please follow me.
You : Thank you.
Example 3
You : Excuse me. How can I find the book called "ABC"?
Mr.A : Oh. I'm afraid it was sold out.
You : It's ok. Thank you.