Which is the least formal and more common way to say that you will plan a date (Romantic encounter) with someone again?
Suzy and I didn't get a chance to go on a date this weekend because of her job. We'll reschedule our date for next weekend.
(I think this sounds a bit too formal, I don't hear people saying "I have to schedule/reschedule a date with this girl I've been talking to" it sounds to me that the word schedule/reschedule is only used for more important situations such a visit to the doctor or a school meeting.)
Suzy and I didn't get a chance to go on a date this weekend because of her job. I'll have to line up another date for next weekend.
(Line up might be the most common way of saying this as I've heard many native speakers using this expression before.)
Suzy and I didn't get a chance to go on a date this weekend because of her job. I'll have to set up another date for next weekend.
(This is a little tricky, I've never heard Let's set up a date unless it were an unspecified date for something completely different than a romantic encounter. For example: Let's set up a date to play soccer at your house or Let me set up an appointment with the doctor")
Also I would like to ask whether any of these could be used for any situation. Not only a date, but for other stuff such as planning a day so you can go out with friends or planning a date to go to someone's house.