Question. What type of booking office is likely to be used for planning a trip?
Options:
- england
- police station
- airport
- travel agency
- city
Answer. travel agency
What step-by-step reasoning justifies that answer?

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Reasoning: Offices that help in organizing trips are called travel agencies. A travel agency is a type of business.