Hi ​@Karine53503 ! Thanks for reaching out - There are two things you can do here to accomplish this!

1. I would set those times up as individual slots in your availability - So instead of setting it to 9am-5pm for example, each time has their own slot like this:

   

2. From there, I would also change the start time increments in your event settings to 90 Minutes, so only those slots will show as available:

   

You can try something like this to ensure only those times appear - Let me know if you have any questions!

Hi David,

Thank you very much for your quick reply and helping me out. I will try it out and come back if i have questions