I got you something. I hope you like it.
Look what I have for you!
I thought you might like this for ...
Happy Birthday! [Happy Anniversary!] Here's a little gift/present for you.
[Handing present to someone] Enjoy!
It's only something small, but I hope you like it.
Here's a little present for you.
Guess what I bought you!
[Name] I'd like to give you this present/gift.
[Name], This is a present that I/we/staff/got you.
I'd like to present you with this ... [very formal, used when giving an award or special present]
In the name of [xyz], I'd like to give you this present. [also very formal]
Here is a token of our appreciation.
Thank you so much!
That's so kind!
You shouldn't have!
Thank you! It's beautiful.
I love it! I'll put it on / hang it up [etc.] immediately.
That is so thoughtful of you. It matches my ... perfectly！
How did you know I've always wanted a ... to go with my...?
Thank you. I really needed a ...
Fantastic! I've been thinking about getting a ...
This is exactly what I needed. Now, I can ...
How kind of you! I've always wanted to see ... in concert / at the movies / at an exhibition.
Wow! This is a dream come true! Tickets for ...
Thank you so much! I've hoped/wanted to travel to ... for a long time.