At London NBS you have a host at the door that registers every client with a department depending on what they are looking for.
I was waiting in line when I overheard the older couple in front of me...
Host: *politely welcomes the couple and asks how they could help*
Woman: I'm looking to buy a bracelet for my daughter - its this one (shows a photo on her phone of an enamel bangle)
H: Of course, can I have your details - I will put your name on the waitlist and someone can assist you
W: BUT do you have the bracelet?!?!
H: Let me check for you - can I see the product code of the one you want to buy
W: I don't know which one my daughter wants
H: Then it would be best to speak to an SA so you can see different options
W: I don't want to wait if you don't have it!!!
H: I understand, but I can't check stock if you don't have the specific details
Patient Husband: why don't we call *daughter* to ask which one she wants us to buy her.
H: Great idea - if you can step to the side while I check in the next person
W: NO! (significantly raising her voice) I came first and I don't want to loose my place in the queue.

2 people behind her in the queue including me: *trying not to roll our eyes*

Floor Manager - notices I am next and immediately approaches me and walks me to the leather department.
As I was leaving the store I hear...
W: NO! You can't make me do anything! Its MY phone and I will take as many pictures as I want!!!
(continues to snap random photos while quickly walking in the opposite direction of the security guard that had asked her to stop)
No surprise it was the same woman that was looking for a bracelet earlier on!
Patient Husband standing by the store stairs ready to make a swift exit
It's funny to see how people behave when they don't get what they want