We study propagation dynamics of a particle phase in a single-file pore connected to a reservoir of particles (bulk liquid phase). We show that the total mass $M(t)$ of particles entering the pore up to time $t$ grows as $M(t) = 2 m(J,rho_F) sqrt{D_0 t}$, where $D_0$ is the bare diffusion coefficient and the prefactor $m(J,rho_F)$ is a non-trivial function of the reservoir density $rho_F$ and the amplitude $J$ of attractive particle-particle interactions. Behavior of the dynamic density profiles is also discussed.
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