Question:
Who was the chair of NatWest Group in Apr, 2005?

Context:
 Tom McKillop is the chair of NatWest Group from Apr, 2006 to Feb, 2009. 
 Sir Philip Hampton is the chair of NatWest Group from Feb, 2009 to Sep, 2015. 
 George Mathewson is the chair of NatWest Group from May, 2001 to Apr, 2006. 
 Sir Howard Davies is the chair of NatWest Group from Sep, 2015 to Dec, 2022.

Answer:
Question:
Who was the chair of NatWest Group in Apr, 2005?

Context:
 Tom McKillop is the chair of NatWest Group from Apr, 2006 to Feb, 2009. 
 Sir Philip Hampton is the chair of NatWest Group from Feb, 2009 to Sep, 2015. 
 George Mathewson is the chair of NatWest Group from May, 2001 to Apr, 2006. 
 Sir Howard Davies is the chair of NatWest Group from Sep, 2015 to Dec, 2022.

Answer:
user
George Mathewson
assistant
Question:
Who was the chair of NatWest Group in Apr, 2005?

Context:
 Tom McKillop is the chair of NatWest Group from Apr, 2006 to Feb, 2009. 
 Sir Philip Hampton is the chair of NatWest Group from Feb, 2009 to Sep, 2015. 
 George Mathewson is the chair of NatWest Group from May, 2001 to Apr, 2006. 
 Sir Howard Davies is the chair of NatWest Group from Sep, 2015 to Dec, 2022.

Answer:
user
Tom McKillop
Sir Philip Hampton
Sir Howard Davies
assistant
Question:
Who was the chair of NatWest Group in Apr, 2005?

Context:
 Tom McKillop is the chair of NatWest Group from Apr, 2006 to Feb, 2009. 
 Sir Philip Hampton is the chair of NatWest Group from Feb, 2009 to Sep, 2015. 
 George Mathewson is the chair of NatWest Group from May, 2001 to Apr, 2006. 
 Sir Howard Davies is the chair of NatWest Group from Sep, 2015 to Dec, 2022.

Answer:
user
George Mathewson
assistant