Definition: In this task, you're given five sentences, numbered 1 through 5, and two options a and b for possible titles for the story. Your job is to choose the title that better fits the story. Indicate your choice by 'a' or 'b'.
Input: Sentence 1: Callie was out with friends for dinner. Sentence 2: Her waiter hadn't been around to take their orders. Sentence 3: Callie and her friends had to place their orders with another waiter. Sentence 4: She saw their waiter leaning on the bar, playing on his phone. Sentence 5: Callie didn't leave the waiter a tip. Choices: a. Total relaxation. b. No Tip.

b