This is Kakio aka Pink Champagne, group 2
Clematis 'Pink Champagne'
Clematis 'Ville de Lyon' has more round form and smaller flower size. It belongs to viticella group 3 and starts flowering much later.
This is also the answer for Susan. Her clematis is not Pink Champagne. Pink Champagne has some blue tint. Kakio has a pure pink sibling Asao ( the same cross).
Clematis 'Asao' has no blue tint but the texture of the petals is smooth, not like your picture. Nikolai Rubtsov is a very good candidate
Clematis 'Nikolai Rubtsov'. I have all 3 in my collection. The only doubts I have about Nikolai Rubtsov it's not widely sold. I found it only at Brushwood nursery.