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

Input: Consider Input: customer: Hello. 
 agent: Hello, how can I assist you today? 
 customer:  I am Pamela Gonzalez. I want to cancel my recent reservation, because I want to travel  with my friends by road. Can you help me in cancelling? 
 agent: Sure, please wait for a moment. 
 customer: Ok. 
 agent: Sorry to say that, no reservation was found with your good name. 
 customer: Thank you for your help. 
 agent: Thank you for reaching us.

Output: no_reservation


Input: Consider Input: customer: Hello. 
 agent: Hello. How can I assist you today? 
 customer: My name is Janet Rodriguez. I have a plan to meet my friend in Seattle, can you help me for booking a flight ticket? 
 agent: Sure, I will help you in booking. Can you please help me with your travel dates? 
 customer: My travelling dates are from 03/30 till 04/01. 
 agent: Ok, may I know your airport codes? 
 customer: My travelling airport codes are from MCO to SEA. 
 agent: Here, I found a flight for you with 1 connection and fare is 100. Shall I proceed? 
 customer: Ok, please proceed for booking. 
 agent: Your booking is done with flight 1015 and airline is Spirit. 
 customer: Thank you for booking. 
 agent: Welcome, have a safe flight.

Output: book


Input: Consider Input: customer: Hello. 
 agent: Hello, how may I help you? 
 customer: My name is Jacob Thomas, I want to book a flight from DTW to OAK to visit trade fair. Can you book a flight for me? 
 agent: Sure, may I know your travelling dates? 
 customer: I will fly on Nov 12 and return on Nov 14. 
 agent: Do you have any depart and return time? 
 customer: I will depart in afternoon. 
 agent: Can I know your class? 
 customer: Sorry there is no any class preference. 
 agent: There is a flight on United airline, flight number 1001 with the fare of 200 and depart is 17 PM. Can I proceed? 
 customer: Please proceed if it have a single connection. 
 agent: Your ticket has been booked. 
 customer: Thank you for helping me. 
 agent: Thank you for reaching us.
Output: book