Record label permission letter

Copyright is the legal right given to the person who creates a piece of work. For example; an artists own the right over their own work and controls who can use it or reproduce it- E.g Lana Del Rey and her song 'Without You'. 

While creating our music video it was important to us that we needed to ask permission to use the song we had chosen before we carried on planning. Due to this we emailed Lana Del Rey's record label 'Stranger Records' to confirm that we can use her song 'Without You'. 

Below is a print screen of the email we sent to 'Stranger Records'. We stated clearly the purpose of use using the song and that if they don't reply we presume  that we're allowed to use the song.