How is this sentence called?

I am working on chatbots and need to identify this part of the desired response. Basically, I want the model to return an answer with a chatty and introductory attitude. But I am having problems finding a name for this part of the language.

For example,

Human: Hi! I need help with XYZ, can you help me?
AI: **Hey, sure. I am glad you are asking. Just a moment. Here it is. So,** \[ANSWER\].

So, what is this part ("Hey, …

languagetechnology