Task-oriented dialogue about: train

i am looking for a train. The train should leave on Saturday and should depart from Cambridge.
I can help with that! Where will you be traveling to?
Make that Tuesday. And I need to go to Stansted Airport.
Okay, I changed the day of travel to tuesday for you. Do you know what time you might want to leave after or arrive by?
I want to arrive by 19:30 please
Train TR9495 arrives at 19:08. Would you like to purchase tickets?
No thanks, that's actually all the info I needed from you today. Thank you!
Okay, great. Call us back if you need anything else. Goodbye.