MattiaParla on "[Plugin: Contact Form 7] Concatenate two fields"

Hi to everyone,
i need concatenate two field of my contact form.

I would like concatenate "Locations" and "Room type" because for every locations "Santa Caterina" "Porto Cesareo" "Lecce" "Copertino" i have different typology of rooms.
Every rooms has an id number.

http://lnx.bedinnsalento.it/

<p>Locations:[select locations "Santa Caterina" "Porto Cesareo" "Lecce" "Copertino"]</p>
<p>Room type (if you change the type of rooms the calendar will be updated accordingly)</p>
<p>[select room class:room-type][room_type_data]</p>
<p>Use the calendar to select all the nights of your stay:[text* dates id:dates]</p>
<div style="position:relative">[calendar name="dates" type="pop-up" options="multiSelect:15"]</div>

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Any helps?
Thank you in advanced.
M

http://wordpress.org/plugins/contact-form-7/