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: Hello,. I am Cynthia Roberts. 
 agent: Hello, how can I help you now? 
 customer: I made a earlier reservation to go for a trip with my friends, due to some financial problems, it got postponed. Can you please change my existing reservation? 
 agent: Sure, I will help you with that. 
 customer: Thank you. 
 agent: Please wait for a moment, while I check for the reservation. 
 customer: Sure. 
 agent: Thank you for waiting, sorry there is no reservation found on your name in our system data. 
 customer: Ok, no issue. Thank you for your information. 
 agent: Thank you for reaching us, we hope see you again.
no_reservation

customer: Hello. 
 agent: Hello. How can I guide you? 
 customer: I am Carol Lewis. Due to my health problem I want to change my reservation, can you please help me to change my reservation? 
 agent: Sure, I will help you. Can you please give me a minute to check the ticket status? 
 customer: Sure, take your own time. 
 agent: Sorry Lewis, there is no reservation found with your name in our system database. 
 customer: That's fine. Thank you for your help. 
 agent: Thank you for choosing us.
no_reservation

customer: Hello. 
 agent: Hello. How can I assist you? 
 customer: I am Nicholas Martinez. I am travelling from Denver-DEN to Philadelphia-PHL to meet my parents. 
 agent: Sure, can I know the travel dates please? 
 customer: My departure dates is on 06/08 and return on 06/10. 
 agent: Ok, wait a moment please. 
 customer: Ok. 
 agent: There is a flight in JetBlue airline with price 100, can I book it? 
 customer: Please proceed for booking. 
 agent: Your ticket has been booked with flight number 1018. 
 customer: Thank you for your help. 
 agent: You are welcome.
book