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

Example Input: customer: Hello. Is this a flight ticket booking agency? 
 agent: Please let me know, what kind of service your looking for? 
 customer: Yes, I have seen that your agency can help the customer in flight ticket booking. So, now please help me with ticket booking from DTW to MCO. Can you help me in that one? 
 agent: Sure, please share me your trip dates. 
 customer: Thank you and I have planned to travel in the month of Nov and the travel dates would be 11 and 13. 
 agent: May I know your airlines preferences? 
 customer: I am ok with any airlines. 
 agent: Please share me your connection limit. 
 customer: I am looking for a single connection flight in between my journey. 
 agent: Is there any class specifications for you? 
 customer: No, that's it. The above mentioned are my requirements, check with that one. 
 agent: We found a Delta airline and 1023 is flight number with a fare of 200. Shall I proceed? 
 customer: I am Janet Young and you can proceed with booking the ticket on my name. 
 agent: Your ticket is confirmed with an economy class. 
 customer: Thank you for your immediate response with my flight ticket reservation. 
 agent: Thank you for reaching us. 
 customer: Welcome.
Example Output: book

Example 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.
Example Output: no_reservation

Example Input: customer: Hi, Nicole Nelson here. 
 agent: Hello. How can I help you today? 
 customer: I want to cancel my recent reservation due to my health issue, will you help me out? 
 agent: Sure, I can help you with that. Please allow me a moment to check the details for you. 
 customer: Ok. 
 agent: Your patience is greatly appreciated. Nicole, I have checked and see that there is no reservation found under your name. 
 customer: It's ok, no issues. Thank you for your information. 
 agent: You are welcome. Thank you for contacting us.
Example Output:
no_reservation