In my application, I am using Azure Bot Service with MS Teams.

When I send a message from Azure Bot Service- Web Chat, I am getting a message from the bot, but when I reply with a response, the bot service doesn't receive it.

I don't want to use Bot framework, instead I am trying with the agent.

Since I am using MS Teams in the bot service, should I use the code below or prefer the 365 agent SDK or Teams SDK?

In the code below I am getting all details in response, but it's not received at the bot service.

return Results.Ok(response);

In program.cs file--

app.MapBotEndpoints();
 
and classes below 

namespace AgentApp.Services
{
    public interface IMessageService
    {
        Task HandleMessageAsync(Activity activity);
    }

    public class MessageService : IMessageService
    {
        public Task HandleMessageAsync(Activity activity)
        {
            var userMessage = activity.Text?.ToLower();
            string reply = "Hi! This is your bot.";

            // Build response for your custom bot
            return Task.FromResult(new Activity
            {
                Type = "message",
                Text = reply,
                From = activity.Recipient,
                Recipient = activity.From
            });
        }
    }   
}

namespace AgentApp.Endpoints
{
    public static class BotEndpoints
    {
        public static void MapBotEndpoints(this WebApplication app)
        {
            app.MapPost("/api/messages", async (HttpContext context, IMessageService service) =>
            {
                var activity = await context.Request.ReadFromJsonAsync();

                if (activity == null || activity.Type != "message")
                    return Results.Ok();

                var response = await service.HandleMessageAsync(activity);
                return Results.Ok(response);
            });
        }
    }
}