A:I think I've come to say goodbye. A:Really I must be going.The train leaves at five twenty. A:Oh,I certainly won't forget that.Thanks for everything. A:Bye for now,and all the best. 1313 A: I think I've come to say goodbye. A: Really I must be going. The train leaves at five twenty. A: Oh, I certainly won't forget that. Thanks for everything. A: Bye for now, and all the best