Go: Is there a way to set values of a struct inside interface? [duplicate]

I'm new to Go and have this problem to which I can't find a solution (I don't even know if it is a problem or if it is the expected behavior).

I have a Struct like the following:

type Info struct {
  Id      string
  Request interface{}
}

Request can be of different types, ex.

type ReqType1 struct {
  Quantity int
  Code     float32
}

or

type ReqType2 struct {
  Name string
  Code float32
}

My question is: if I have var i of type Info, and i.Request type is ReqType2, is it possible to set the value of Name without needing another variable request (like the following)?

I know I can just do:

request := i.Request.(ReqType2)
request.Name = "Maddie"
i.Request = request

But I have a lot more attributes, and was hoping there was another way to do so. I tried using reflect pkg but couldn't get it right. I tried:

reflect.ValueOf(i.Request).Elem().FieldByName("Name").SetString("Maddie")