What time slots do you have available?

Meaning

Directly inquiring about available times.

Examples

• John: Are you free to meet next week?
• Alice: Let me check my schedule. <b>What time slots do you have available</b>?
• John: I'm free most afternoons.
• Alice: Okay, I'll check my calendar and let you know. Again, <b>what time slots do you have available</b>?