@Liz300 first of all, you should never cancel (at least not without involving AirBnB support so as to avoid penalties).
It is also too early to flag / report the profile.
It would be appropriate to let the guest know you are confused by the photo and name, and to ask for clarification. For example:
"Hello! I have been told that it is important for a host to be able to positively identify the arriving guest for everyone's security. (To be sure we are handing keys to the right person.) Could you clarify which person in the photo is you, and also what name you prefer to be addressed by? I want to be able identify you and greet you properly."
If they are not pictured in the profile photos, then ask them to add a photo that shows their face clearly.