InfoPath Dev

I am new to this group and looking for some help on how to implement room reservation system in Infopath form. Please suggest.

I have text box in Info Path form and i would like to user to enter in this format only. it should not allow other format. 1) first 3 character should be in text format 2) then put "-" 3) after that four digit character Ex: ABC-1234 Please help me on this.

I have resolved the issue last week, Created rule and set data connection to retrieve the data based on logged in user. also indexed the column which i need to lookup in SharePoint list.

Thanks for your input on this. Created SharePoint custom list and edited in InfoPath for customization and deployed. No issue with other lists. Actually I have taken copy list as template and added in another subside and it's working fine without any changes. I feel when I / single user used no issue the form is working fine. ...

I have created InfoPath 2013 forms for submit data. I have created two list 1 is lookup list and another one is submit list. the functionality is when user login to the page it will capture some lookup data from lookup list based on who logged in to submit list.  Issue: when multiple user login to this site then getting performance ...