Remember, all agents network together, meaning you can ask your realtor to show you any home on the market, regardless of who's sign is on the property. Good Luck
Pick the agent that you feel comfortable working with. I recommend looking for agents that have National Association of Realtors designations such as GRI, CRS, ABR,SFR, and many more. These initials demonstrate dedication to the industry. The GRI is 90 hours of in class training. My motto is that most people's primary residence is in their top 5 of their financial portfolio and my job is to keep it that way. It all starts with your first purchase so get it right. Best
You, as a buyer, have the right to buy with any agent of your choice but avoid the above situation. No sense making problems for yourself.