Could I leave a message?

Can I leave a message?

A question asked when the person one wishes to speak to is currently unavailable. Well, if he's in a meeting, can I just leave a message?
See also: can, leave

Could I leave a message?

 and Can I leave a message?
Can I request that a message be written down for a person who is not available to come to the telephone. Bill: Can I talk to Fred? Mary: He's not here. Bill: Could I leave a message? Mary: Sure, I can leave a message for him.
See also: could, leave
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