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 assist you at this moment? 
 customer: I need to cancel my reservation as I need to stay back in own city, due to my house has collapsed by Floods. 
 agent: May I know your name to track your details? 
 customer: Sure, I am Patricia Roberts. 
 agent: Ok, please give me a minute. 
 customer: Sure. 
 agent: Thanks for your time, no reservation was found based on your name. 
 customer: Ok, Thank you for your service. 
 agent: Thank you for consulting us.

Output: no_reservation


Input: Consider Input: customer: Hello. 
 agent: Hello, how may I assist you? 
 customer: I am Edward Hernandez, I am willing to have a trip in the month of December in Orlando city for two days. Can you help me with my flight ticket booking from Boston? 
 agent: Sure, may I know your planned travel dates please? 
 customer: Thank you for reacting positively, my planned travel dates are 12/02 and 12/04. 
 agent: Can you please share your source and destination airport codes? 
 customer: Sure, my nearest airports as my source and destination are BOS and MCO respectively. 
 agent: There is a flight available on your requested dates from Frontier airlines with 1 connecting flight.Shall I confirm your booking? 
 customer: You may confirm my reservation with this flight. 
 agent: Your ticket is booked with flight 1002. 
 customer: Thank you for our quick response. 
 agent: You are welcome.

Output: book


Input: Consider Input: customer: Hello. 
 agent: Hello, how can I guide you today? 
 customer: Can you please help me with booking a flight ticket from LGA to BOS? 
 agent: Can you please share your travelling dates? 
 customer: My travelling dates are from Mar 29-31. 
 agent: Do you have class preference? 
 customer: I am comfortable with any class. 
 agent: Do you need connection limit? 
 customer: I prefer to fly in direct flight. 
 agent: May I know your name? 
 customer: Patricia Scott here. 
 agent: Sorry, no flight found in that route. 
 customer: No problem, thank you for the information. 
 agent: Thank you for choosing us.
Output: no_flight