I can't pass venue 4 level 6

It seems impossible i think it is because of the seating plan can anyone help?

Don't worry. I'm going to play the game right now and I'll type up a seating plan soon.

I think you might have meant Wedding Dash 2 but here it is anyway.
 
Wedding Planning Items: Tower Callas, Lemon Chiffon, San Francisco
 
Round 1 Left to Right
 
Heart Table: Diane, Derek, Al, Betty
Dove Table: Ernie, Allison, Ethel, Ernie
Bell Table: Betty, Bob, Chloe, Bob
 
Keep Ethel and Chloe so the three Chucks can sit next to them. When they're seated, give Chloe and Ethel their cake.
 
Round 2 Left to Right
 
Heart Table: Bob, Al, Chuck
Dove Table: Chloe, Al, Bob, Chuck
Bell Table: Chuck, Chuck, Chuck
 
Keep Chloe then seat Chuck next to her, Two of the Chucks want to sit next to Chloe but that's ok.
 
Round 3 Left to Right
 
Dove Table: Chloe, Chuck, Chuck - Give Chloe cake after the two Chucks sit down.
 
I hope that helped. Let me know if you want any other seating plans.