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 guide you today? 
 customer: Can you aid me to book my ticket from IAH to LGA? 
 agent: Surely, I will help you out. 
 customer: Thank you. 
 agent: Kindly, share your planned dates. 
 customer: My trip dates are Sep 20 and Sep 22 respectively. 
 agent: Is there any class preference? 
 customer: I am comfortable with any class. 
 agent: Can I have your name please? 
 customer: Dorothy White here. 
 agent: How many connections you prefer in your journey? 
 customer: I prefer for single connecting flight. 
 agent: Do you have any other concerns? 
 customer: No other concern. 
 agent: Ok, please wait for a couple of minutes. 
 customer: Ok. 
 agent: There is a connecting flight with a fare of 100 found in 1012 American Airline, shall I proceed? 
 customer: Please proceed. 
 agent: Ok, your ticket has been confirmed in economy class. 
 customer: Thank you for the help. 
 agent: Thank you for choosing us.

Output: book


Input: Consider Input: customer: Hello. 
 agent: Hello, how may I aid you? 
 customer: I planned to meet my friend in HOU, can you please help me to book a flight ticket from DCA? 
 agent: Sure, let me know your trip dates please? 
 customer: I prefer to travel on Dec 28 and Dec 30. 
 agent: May I know your connection limit? 
 customer: I prefer to travel in a connecting flight. 
 agent: Do you need any other preference? 
 customer: No. 
 agent: Can I know your name please? 
 customer: I am Amanda Martin. 
 agent: Frontier Airlines is providing connecting flight with the ticket fare of 100 and depart time is 4:00 hours, arrival time is 6:00 hours. Shall I proceed? 
 customer: Ok, please confirm my booking. 
 agent: Your ticket has been confirmed by flight number 1005 and an economy class. 
 customer: Thank you for your help. 
 agent: thanks for choosing us.

Output: book


Input: Consider Input: customer: Hello, I am Jacob Hernandez. 
 agent: Hello, Jacob. Which service are you looking for today? 
 customer: I made a reservation earlier in the wrong date unknowingly so, I want to change my existing reservation. Can you help me in this? 
 agent: Sure, I can help you with that. Let me check with your details and I will revert to you. 
 customer: Sure. 
 agent: Jacob, sorry to inform you that I didn't found any reservation under your name. 
 customer: It's ok, not a problem. Thank you for your information. 
 agent: Thank you for reaching us.
Output: no_reservation