Ответ:
Диалог 1.
Jim: Here`s my present. I hope you like it.
Billy: That`s very kind of you! I`v always wanted cap like this!
Jim: I`m glad you like this. Try it on and see if it fits.
Billy: I think this is coll. What do you think?
Jim: It matches the colour of your T-shirt. I`m glad you liked it.
Диалог 2.
Jim: This is for you.
Shelley: That`s very kind of you! What is it?
Jim: Open it and see.
Shelley: Wow. It`s a lovely skirt.
Jim: I`m glad you like this. Are they your size?
Shelley: Oh, no. They're too big.
Jim: That`s all right. You can exchange them.
Shelley: Thanks
Jim: Don`t mention it.
Вроде так, если каждый диалог нужна была новая вещь. Если я не правильно поняло, то можно просто слово поменять.