In “guide” type themes like CityGuide or Directory+ can be contacted owner of Item post via Contact Owner form.
Email message which is sent over this form can be configured in Theme Options > Item Detail Options page under Contact Owner section:
Default message can be changed and extended using placeholders like: {user-name}, {user-message}, {user-email}, {subject}
All of these placeholders are in email message replaced with values filled by visitor in the form.
Please do not submit multiple tickets for the same request, as this does not result in a faster response time.