Task-oriented dialogue about: train

I want a train from london liverpool street arriving at 9:30
Which day will you be traveling?
I want to leave on Thursday.
Ok, I should be able to do that for you.
I want to go to Cambridge, how much will that cost?
There are three trains that will fit your needs, and the tickets are 16.60 pounds each. Would you like me to purchase tickets for you?
Yes, that sounds good. Thank you.
Would you like me to book that for you?
Can you tell me how much the ticket is?
Yes, there are 3 that cost 16.60 pounds. You could leave at 5:39 if you'd like. Can I book that for you?
No, thanks. No need. I will do that later. Thank you for all the info. Have a nice day.
It's my pleasure. Goodbye!