My requirement is that, If a contact was shown interest via cloudpage which was sent though email for subscription. We need to send an SMS for double optin confirmation.
Ex: abc filled a cloudpage and submitted the form. Immediately we are sending an SMS for confirmation like below "XXXXX: Reply Y or YES to confirm you want to receive messages from XXXXX. Msg freq varies by use. Reply HELP for help. Reply STOP to end. Data rates may apply." . The contact will receive this message and they are trying to reply with Y or YES . But he received an SMS that "The keyword you specified was not recognized". Means it is throwing error and not allowing the contact for Optin. When I am trying to create the keyword Y or YES it is not allowing me as these are reserved keywords. Can anyone give me the perfect solution. Implementation @* Marketing Cloud *
Here the question is how you are capturing the reply of the customer.
If you capturing yes or y in any field based on field update you can trigger one flow if the field value is yes or y then you can send another message to customer.
My suggestion is use any app exchange product that sloves your problems and they will give better solution for reference " ValueText" app will give feasible to send bot instead of template based on the reply of the customer the bot automatically send response.