Detailed Instructions: In this task, you are given a conversation between a flight agent and the customer. You are given 4 options and you need to select the goal of the conversation. It is provided as part of customer's context, which has to be one of the following: `book`: Make a new reservation, `cancel`: Cancel an existing reservation, `no_flight`: No flight found for the customer's preference, `no_reservation`: No reservation / No change / No cancellation was made in the conversation, mostly enquiring details
Q: customer: Hi. 
 agent: Hello. 
 customer: I am Deborah Martin. 
 agent: How may I assist you now? 
 customer: Can you please reserve me a flight ticket from Oakland, CA - OAK to Detroit, MI - DTW? 
 agent: Sure, I am glad to help you with that. Can you please provide your preferable dates of travelling? 
 customer: My trip dates are 02/11 - 02/13. 
 agent: Is there any additional preferences do you want? 
 customer: I need a single connection. 
 agent: Please wait a moment to check the flights on your route. 
 customer: Sure. 
 agent: Based on your travel details, I have found a flight with a single connection with a fare of 100 from Frontier airlines. If you are ok with this, please inform me to book the flight. 
 customer: Please proceed to book. 
 agent: Ok, your ticket has been confirmed in flight number 1029 in economy class. 
 customer: Thank you. 
 agent: Thank you for reaching to our services, hope you have a great day.
A:
book