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

Ex Input:
customer: Hello. 
 agent: Hello. How can I help you? 
 customer: I would like to book a ticket from MCO to DEN, can you please help me out? 
 agent: Can I know your travelling dates? 
 customer: I am travelling on these dates April 20th and 22nd. 
 agent: Is there any airline preference? 
 customer: I don't have any preference. 
 agent: Do you have any class preference? 
 customer: I don't have any other preferences. 
 agent: Let me know your name. 
 customer: Janet Phillips here. 
 agent: Connecting flight can be booked with Hawaiian airlines for price 100 having flight number 1000. 
 customer: Ok, you can proceed. 
 agent: Ticket is booked. 
 customer: Thank you for your services. 
 agent: Thank you.

Ex Output:
book


Ex Input:
customer: Hi. 
 agent: Hello, how may I render you today? 
 customer: I need to cancel my reservation for a client meeting but I have got a sudden call from my friend that one of my friend got met with an accident so I feel to cancel my reservation. Can you please help me out? 
 agent: Sure, may I know your good name? 
 customer: Patrick Carter here. 
 agent: I have checked in reservation list to cancel your ticket, but could not find any reservation with your name. 
 customer: That's ok, thank you for your help. 
 agent: Thank you for choosing us.

Ex Output:
no_reservation


Ex Input:
customer: Hello. 
 agent: Hello, how may I assist you? 
 customer: Can you please help me in cancelling my recent reservation? 
 agent: Sure, may I know your good name please? 
 customer: I am Dennis Baker. 
 agent: Please wait for a moment. 
 customer: Ok. 
 agent: Sorry, there is no reservation found on your name in our database to cancel. 
 customer: Ok, no problem. Thank you. 
 agent: Thank you for reaching us.

Ex Output:
no_reservation