Appointment on the phone

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Across
  1. 2. I'm awfully ???
  2. 3. Do you have anything ???
  3. 7. The English word for "atelier"
  4. 8. What you do in a laboratory
  5. 10. You're most ???
  6. 11. That should be no ???
  7. 15. The name of Mr Bell's assistant
  8. 17. Let me ???
  9. 18. The English word for "rendez-vous"
  10. 19. A phone connected to the house with electricity
  11. 21. A TV program where people sing : The ???
  12. 23. The sound that the phone makes when someone calls
Down
  1. 1. A list of all the phone numbers
  2. 4. What ??? Friday morning
  3. 5. Have a ??? day
  4. 6. And will that be the ???
  5. 9. An American city where Mr Bell lived
  6. 11. A joke on the phone
  7. 12. The English word for "son"
  8. 13. A job made by Alexander Graham Bell
  9. 14. What you pay to use your cell phone
  10. 16. The country where Graham Bell was born
  11. 20. The capacity to perceive sounds
  12. 22. I have been rather busy ???