On the phone:

Frank – Hello. This is Frank. Is that you, Tom?
Tom – Yes, it's me.
Frank – How are you? Would you like to come to my birthday party? It's on Sunday at five in the afternoon.
Tom – I'm sorry, but I had other plans already. My mother asked me to go with her to the bowling alley on Sunday.
Frank – Come on, Tom. You can't miss my party. It will be great. There will be an enormous cake, blowers, streamers, masks, good music and pretty girls. Why don't you ask it to your mother?
Tom – Good idea. Could you wait a moment, please? (Tom speaks to his mother) Mum, Frank is on the phone. His birthday is on Sunday and he's invited me to his party. I know you asked me to go to the bowling alley with you, but we can go next Sunday. May I go to Frank's party?
Tom's mother – Yes, of course.
Tom – Frank, she has agreed. Can I do something to help you with the party? Shall I bring something? I don't know, maybe sweets, crisps, pizza or ice cream.
Frank – Yes, please. I'm sure we'll have a great time. So, see you on Sunday.
Tom – Thank you for your invitation. See you then.