Task-oriented dialogue about: train

I need help finding a train leaving Cambridge after 20:45.
Many trains leave Cambridge around 20:45, what is the destination?
I need to get to london liverpool street.
I have several options for you, and the price and exact departure time varies by day of the week. Do you have a day preference?
I would like to leave on Thursday
Train TR3695 leaves 21:59 and arrives on 23:27. Would you like to book it?
Thanks, that's all. Good bye.
welcome again some other time