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 may I aid you today? 
 customer: My self David Lewis, I need to schedule my trip to Chicago for next week. Could you please help me ion booking the ticket from BOS to ORD? 
 agent: Sure, I am here to help you out. May I know your travel dates? 
 customer: I will take-off 07/11 and again I will be return back on 07/13. 
 agent: Ok, please wait for a while. 
 customer: Sure, I will wait for your response. 
 agent: Thank you for waiting. Sorry Lewis, there are no flights available. 
 customer: Not an issue, anyhow thank you very much for your help.

Output: no_flight


Input: Consider Input: customer: Hello. 
 agent: Hello. 
 customer: Larry Allen here. 
 agent: How may I assist you? 
 customer: I want to travel from SEA to LAX for my business trip, can you please help me out with booking of a flight ticket on those locations? 
 agent: May I know your travelling dates please? 
 customer: Sure, I am planning to move on 11/07 and please book my return ticket also on 11/09. 
 agent: Ok, please wait for a moment. 
 customer: Sure. 
 agent: Flight-1007 is available for you with 1 connection at the price of 100, can I proceed with booking? 
 customer: That's fine for me to travel, you can proceed with booking. 
 agent: Your booking is done. 
 customer: Thank you for your help in booking of my ticket. 
 agent: Thank you for choosing us. 
 customer: Welcome.

Output: book


Input: Consider Input: customer: Hello,. 
 agent: Hello. How may I help you? 
 customer: Can you please help me in cancelling my recent reservation, as my exam got cancelled. 
 agent: Can you share your name? 
 customer: Myself, Jennifer Mitchell. 
 agent: Sorry, there is no reservation found under your name. 
 customer: Ok, no issues. Thank you for your service. 
 agent: Thank you for reaching us.
Output: no_reservation