Task-oriented dialogue about: taxi

Please help me arrange for a taxi
Where is your departure site?
I'd like to leave aylesbray lodge guest house by 12:15
Ok, and what is your destination please?
I'm going to ask.
Ok, please let me know when you know.
Ok, we want to be at the tall monument.
I do not see anything called Tall Monument. Is there another name for it?
We actually want to go to Ask.
Booking completed! Booked car type : yellow audi Contact number : 07180084574
Just to be sure a yellow taxi will get me from aylesbray lodge guest house to Ask by 12:15, correct?
No, you will be picked up in a grey ford, contact number 07998569074, is that ok?