Speak out loud after each line. Using your mouth builds muscle memory. Record yourself if you can.
Dialogue
Maria: Hello, John. It’s Maria. How are you?
John: Hi, Maria! I’m good, thanks. What about you?
Maria: I am fine too. I want to talk about our childhood.
John: Yes! I loved those days. They helped us developing as friends.
Maria: Exactly! Those memories are the least I will forget.
John: Me too! Let’s meet and share more stories.
Maria: Great idea! See you soon!