Definition: In this task, you need to generate an appropriate title for the given summary of some paragraph. The generated title must be short and should include the main topic of the given text. Your summary should be less than 20 words long.
Input: Asda has said customers were "cautious" over the Christmas period as it revealed that its sales fell in the final three months of last year.

Asda's Christmas sales hit by 'cautious' spending