Master high-frequency phrases using the 80/20 principle for rapid Spanish fluency
Thank you very much for your attention
I apologize for the inconvenience (formal)
Please do not hesitate to contact me (formal)
If you need more information (formal)
I am at your disposal (formal)
Awaiting your reply (formal)
Without further ado (formal closing)
I am contacting you (formal)
I am writing regarding (formal)
In relation to