How to make prompts dynamic for AWS LEX service?

Hi

I am working on AWS lex. I have integrated AWS lex with lambda , S3 storage and DynamoDB. I want to achieve the following goal:- I have stored an excel(CSV) file in my S3 with a header "Vacancy for Java Developer". and i want to take java developer and change that in the prompt where I am telling user about this job vacancy. Basically i want the chatbot to be a little dynamic so that it can change prompt as per the header of excel sheet