On the telephone
Tracy: Hello, can I speak to Alex?
Alex: This is Alex, who is speaking?
Tracy: Hi, this is Tracy.
Alex: Hi Tracy. What are you doing?
Tracy: Oh, I'm just watching TV. What are you doing?
Alex: Well, I'm cooking dinner.
Tracy: What are you cooking?
Alex: I'm baking some potatoes, boiling some carrots and grilling a steak.
Tracy: It sounds delicious.
Alex: What are you doing for dinner tonight?
Tracy: Well, I don't have any plans...
Alex: Would you like to come over for dinner?
Tracy: Oh, I'd love to. Thanks.
Alex: Great. Mary and Jack are also coming. They are arriving at seven.
Tracy: OK, I'll be there at seven, too.
Alex: OK, see you then. Bye.
Tracy: Bye.