Traditionally the bride and groom will be asked by the minister performing the service, something similar to the following questions of intent.
Questions to Groom:
"Will you have this woman to be your wedded wife, to live together in the holy estate of matrimony? Will you love her, comfort her, honor, and keep her, in sickness and in health; and forsaking all others keep thee only unto her so long as you both shall live?"
Answer: I will
Questions to Bride:
"Will you have this man to be your wedded husband, to live together in holy estate of matrimony? Will you love him, comfort him, honor and keep him, in sickness and in health, and forsaking all others keep thee only unto him so long as you both shall live?"
Answer: I will
Question to Bride's Father
"Who gives this woman to be married today?"
Answer: I do