Here is the transcript...

Hilton: I'll connect you with an agent who can help.
Jonathan (19:35:07 GMT) : Hi, this is Jonathan. I see you were chatting with our Virtual Assistant. Thank you for your patience as I review your conversation to see how I can help.

Visitor (19:35:23 GMT) : Thanks.
Jonathan (19:35:38 GMT) : Hello, am I chatting with David?
Visitor (19:35:43 GMT) : Yes
Jonathan (19:36:10 GMT) : Hi David, I see you want to modify the booking, right?
Visitor (19:36:24 GMT) : Correct
Visitor (19:36:49 GMT) : The 17-27. Need to adjust to 19-26 checkout.
Jonathan (19:37:04 GMT) : Sure, it will be 7 nights then, right?
Visitor (19:37:16 GMT) : Yes.
Jonathan (19:37:29 GMT) : Sure, may I ask your e-mail address?
Visitor (19:37:45 GMT) : Should just need points for 6. [email protected]
Jonathan (19:37:59 GMT) : Okay, it will be all points booking, right?
Visitor (19:38:42 GMT) : Correct. Current reservation is all points now. So I assume the extra points will post back to the account.
Jonathan (19:39:05 GMT) : Exactly, you are correct, they will be back. Making the changes now.
Visitor (19:39:13 GMT) : Thank you.
Jonathan (19:39:43 GMT) : It is done, new check in date is 19th and check out date is 26.