Be happy to

be happy to (do something)

To be glad or eager to do something. Sure, I'd be happy to help! What do you need? He said he would be happy to meet us for drinks, so I'm not sure why he isn't here already.
See also: happy
Farlex Dictionary of Idioms.

Be happy to

(do something). Go to (I'd be) happy to (do something).
See also: happy
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • be happy to (do something)
  • id
  • happy to
  • (I'd be) happy to (do something)
  • get (something) out in the open
  • the happy day
  • the disease to please
  • disease to please
  • cut back to
  • cut back to (someone or something)
References in periodicals archive
CRISTIANO Ronaldo has confirmed he'd be happy to stay at Old Trafford for life - if it wasn't for the Manchester weather.
Football: RON RAPS RAIN
"I would be happy to stay exactly with the same squad but it is a normal process at a club like Chelsea to change.
I'd be happy to stay exactly with the same players but it is normal to look for one, two or three players to try to improve, and always one, two or three players are keen to make a move."
Football: Jose not bothered by Ballack; Bolton v Chelsea
"So I would be happy to stay with exactly the same squad but it is a normal process in a club like Chelsea to make changes."
Football: ..HE'S ALREADY PLANNING FOR NEXT SEASON! BARCLAYS PREMIERSHIP Bolton Wanderers v Chelsea, today, kick-off 12.45pm
"I'd be happy to stay longer than my present contract.
Football: Ess 'to stay' for life; FOOTBALL SPECIAL: WHIZZKID WHO'S MAKING ALL THE HEADLINES