Keep going through the corridor which is in front of the reception. We have got direction signs sir.
The first sentence is an imperative, so you can leave out the You'll. Opposite the reception can be in front of, same meaning but sounds more natural. I'm not sure how to explain the have got..
Thank you, Chantal. I've changed both of them. It's better this way but actually the first sentence is not an imperative. It's future tense, 2. plural.