Dialogflow integration with skype/teams

I have integrated Dialogflow with Microsoft Teams as per the instructions here. It works fine. I want to add calendar [integration](https://codelabs.developers.google.com/codelabs/chatbots-dialogflow-fulfillment#5) as well. When I try to do this with separate cloud function/cloud run, it works fine in the Dialogflow console but when I test in teams, it creates a calendar event but there is no response from webhook to teams (I get the webhook response only in Dialogflow console). This is probably because the teams doesn't recognize a normal message, it has to be converted to a skype message. This is the response back from webhook:

conv.ask('Ok, let me see if we can fit you in.');

How do I convert this particular message to skype message using node js?