@Halima18 I will point out that you also only have one review 🙂
Everyone starts out on Airbnb with no reviews, both hosts and guests. If no hosts accepted guests with no or only one review, and no guests ever booked a place with no or only one review, the platform wouldn't even be able to exist.
If the co-host has been responsive to your messages, and nothing about the communication makes you uneasy or uncomfortable, and the one review they do have is good, I certainly wouldn't be concerned.