I don't know why anyone would be concerned about their booking rate. What does that even mean anyway? How many people looked at your listing, vs. how many people actually booked. Why would that matter?
If you were running a Scotch Tape Store in a shopping mall you might have figures on the total number of people who walked past your store each day.... and you could have the exact number of people who walked into your store... and the number of people who actually purchased a roll of Scotch Tape from you. When you've got an endless supply of rolls of tape those numbers help you determine how well you are doing. How many people are you and your sales staff interacting with, how can you get more of those people who walk into your store to walk out with a roll of tape.... But when you've got a limited number of rolls of tape, and those rolls of tape expire, and go bad at the end of the day, the important number is how many rolls of tape did I sell today.
The only number you should be concerned with is your occupancy rate. If you have one listing, you have 365 days to fill. It doesn't matter how many people drove by... all that matters is how many nights you filled. AirBnB is going to tell you that you need to see 100% occupancy. And if you're not at 100% occupancy, you need to drop your rates like a cheap whore to attract enough people to get you to 100% BUT.... do you really want to be at 100%? That's a hell of a lot of work. At 100% you've got a successful business, but do you have a life? Don't worry about meaningless numbers. Worry about you. Find that point at which it is worthwhile to be in business. A point at which your guests are happy to stay, and you're not working your ass off for less. You need to find that sweet spot.... And that sweet spot has nothing to do with booking rate.