Let's learn simple expressions.
Nice, Congrats, wonderful, marvellous
Excellent, good.
Thank you.
I am sorry.
Please be seated.
Good morning.
Good evening.
Good night.
Good bye.
See you.
Have a nice day!
I see.
Its alright.
Don't worry.
No problem.
It doesn't matter.
What happend?
So, what ?
Don't go.
Don't forget.
Don't be silly.
Please come in.
You may go.
Be happy.
Open the door.
Close the door.
May I help you?
What do you want?
Can I help you?
How can I help you? etc.