Sure, here are some acoustic guitar songs that would be perfect for a relaxed playlist:

1. "Blackbird" - The Beatles
2. "Tears in Heaven" - Eric Clapton
3. "Hotel California" - Eagles (Acoustic version)
4. "The Sound of Silence" - Simon & Garfunkel
5. "Wish You Were Here" - Pink Floyd
6. "More Than Words" - Extreme
7. "Hallelujah" - Jeff Buckley
8. "Good Riddance (Time of Your Life)" - Green Day
9. "Banana Pancakes" - Jack Johnson
10. "Fast Car" - Tracy Chapman
11. "Wonderwall" - Oasis
12. "Free Fallin'" - John Mayer (Tom Petty Cover)
13. "Let Her Go" - Passenger
14. "I Will Follow You Into The Dark" - Death Cab for Cutie
15. "Budapest" - George Ezra
16. "I'm Yours" - Jason Mraz
17. "Ain't No Sunshine" - Bill Withers
18. "Better Together" - Jack Johnson
19. "Blowin' in the Wind" - Bob Dylan
20. "American Pie" - Don McLean

Remember, music is subjective and these are just some suggestions. Enjoy your relaxed playlist!