Numbers as an input in chatbot

Hello everyone, im new in rasa and i want some help… im trying to built a travel agent chatbot and at some point im asking the user to select how many days of vacation he/she needs. I used buttons with payload but i want user to have the ability to type the answer for example “3 days” or “3” . but the flow stops and it is not working. my intent is like: 1 day, 2 days, 3 days, 1-3 days. i would appreciate some help!