написать диалог на английском, пошла к медсестре Наталье Васильевне и сказала что у меня болит живот и она дала таблетку

Sure! Here's a simple dialogue in English based on your request:

You: Hello, Nurse Natalia Vasilevna.
Nurse: Hello! How can I help you?
You: I have a stomach ache.
Nurse: I see. Let me give you a tablet to help with the pain.
You: Thank you very much!

If you'd like it to sound more formal or casual, or if you want to add more details, just let me know!