A: Um...sorry to bother you, um...my name is Rachel. I'm new here. Can I ask you for a favor?
B: Hi, Rachel, welcome on board. I'm afraid I can't help you right now. I'm getting ready for a very important meeting.
A: Excuse me, but can I bother you for a sec?
C: You know what, I'd love to help you, but I'm about to meet an important client. Do you want to try Sean instead? He sits right over there.
A: Sorry to interrupt you, Sean. Could you do me a quick favor?
D: Actually, I'm working on a document that is due in a couple of minutes. I really can't talk to you right now. Sorry about that.
A: Geez, I just want to know where the bathroom is. What's wrong with you people?
welcome on board
Welcome on board, Emily; if you have any question, please feel free to ask me.
We need to get a new office assistant on board as soon as possible.
be about to
I'm about to go out for lunch.
I'll have the chicken instead of the fish.
I wanted to buy a red sweater, but they didn't have one, so I bought a blue one instead.
Sorry to interrupt you, but there's someone to see you.
I hope I'm not interrupting you.