Client asking me to guarantee the volume of conversions

Hi there,

I have a client asking me to guarantee how many conversions he would get by the end of the month. Approximately, but he needs that so we can proceed.

However, I don't know how many conversions he would get by the end of the month so I'd use a tool or something like that to make sure I give him a round number of conversions I can guarantee. Is there any way to do this because he didn't start the campaign yet and he doesn't have any previous information about the market or even...

Client asking me to guarantee the volume of conversions