no problem
No problem (phrase) means You are welcome; a casual reply to thanks, indicating the favour cost the speaker nothing. Example: “Thanks for covering my shift." "No problem.”
How to use no problem
Learner’s notesIn plain EnglishA relaxed way of saying 'that's fine' or 'you're welcome'.
Informal and extremely common in speech; avoid it in formal written correspondence.
As a reply it stands alone; do not add 'it is' in front of it.
Fill the gap
Can you complete this real example?
"Thanks for covering my shift." "_____."