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

customer: Hi. 
 agent: Hello. How can I assist you today? 
 customer: I booked a flight ticket in your agency for my holiday trip to Houston but now I want a change in the travel dates. So can you go ahead and change my flight ticket? 
 agent: Sure, may I know your name to check for the previous reservation? 
 customer: I am Timothy Mitchell. 
 agent: Please allow me a moment. 
 customer: Sure. 
 agent: Timothy Mitchell, there is no reservation found under your name. 
 customer: Ok, not a problem. Thanks for your information. 
 agent: Thank you for contacting us.
no_reservation

customer: Hello, I am Shirley Martinez. 
 agent: Hello, how can I serve your today? 
 customer: I want to visit HOU from my hometown PHL, can you help me with single connection of flight? 
 agent: Sure, may I know your travelling dates? 
 customer: My depart is on 04/26 and return on 04/28. 
 agent: please mention your connections. 
 customer: I need a lay by in between journey. 
 agent: There is a Frontier 1002 with fare of 100 which matches your travelling dates. Shall I proceed with booking? 
 customer: OK, proceed with booking. 
 agent: Your booking has been confirmed on name of Shirley Martinez. 
 customer: Thank you for the help. 
 agent: Thank you for approaching us.
book

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.
no_reservation