Please inform me whether a candidate has to be able to contact you, for example when they arrive at the interview venue around, or you'll leave a message at the reception desk of the hotel.
Please inform me that the candidate will be able to contact you when they arrive at the interview, or you can leave a message at the front desk of the hotel.
Please inform me that the candidate will be able to contact you? When they arrived at the place an interview or you'll leave a message at the reception of the hotel.