Narrow the choices to help your audience more easily make a decision. 
You want to name an amount and a date (within 1-3 days). 
Sounds like this: 

• In booking an appointment: How about we meet up for coffee tomorrow at 2pm near your office. Could that work for you? 

• In an appointment: Would you take this to the prayer closet and seek the Lord on if He's inviting you to give $200 a month, or some other amount? (wait for response) I'll be praying over you as well. Can I touch base with you tomorrow? Is that too soon? 

• In a follow-up text: Very encouraged you're joining my support team! Do you think it would be possible for you to start that gift by Thursday? (two days away) Here is the link to set up the gift online: _____ Let me know if you'd prefer to give by phone or mail. I can send you that info. 

• In a follow-up call: (donor can give) This is very encouraging. Thank you! If you have 5 minutes right now, I can walk you through how to set up that gift, then it's off both of our task lists. Would that be helpful? Giving Steps on Reliant.org