What do you get when you react benzaldehyde and acetophenone with a base?
I'm assuming with heat involved?
You would get the product of an aldol condensation. Specifically for your case, a chalcone.
The mechanism is:
Can you analogize and draw the mechanism for your compounds? This seems like a question related to a lab, and you should be able to do it from here.
CHALLENGE: Do you know why, conformationally, the second half of the reaction does not involve