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 help you? 
 customer: I made a reservation earlier to visit Phoenix in direct flight but now I want to travel in connecting flight. can you help me in changing my reservation? 
 agent: Sure, I will help you. 
 customer: Thank you. 
 agent: May I know your name? 
 customer: I am Sandra Carter. 
 agent: Please, wait for a moment. 
 customer: Ok. 
 agent: Thank you for waiting, there is no reservation found on your name to proceed for modification. 
 customer: No issue. Thank you. 
 agent: Thank you for approaching us.
no_reservation

customer: Hello. 
 agent: Hello\. How may I help you? 
 customer: Mark Phillips here. Can you please help me in booking the ticket from LGA to AUS? 
 agent: May I know your trip dates? 
 customer: My trip dates are 03/21 and 03/23. 
 agent: There is a direct flight with flight number 1018, can I proceed? 
 customer: Please search for a flight with 1 halt. 
 agent: I am sorry to inform you that there is no flight available with 1 connection. 
 customer: That's ok, thank you for giving the information. 
 agent: Thank you for contacting us.
no_flight

customer: Hello. 
 agent: Hello, how can I provide assistance to you? 
 customer: Please book a ticket from HOU to DEN to attend an interview. 
 agent: Sure, we are here to help you. May I know your travel dates? 
 customer: My travelling dates are Oct 15 and Oct 17. 
 agent: Do you need any way station in your journey? 
 customer: I want single way station. 
 agent: At what time, would you like to travel? 
 customer: I am comfortable with any time. 
 agent: Do you have any other requirements? 
 customer: No. 
 agent: May I know your good name please? 
 customer: I am Edward Collins. 
 agent: There is a connecting flight with fare of 100 and 1024 flight number. Shall I proceed? 
 customer: Ok, please proceed. 
 agent: Your seat has been reserved with Spirit airlines in economy class. 
 customer: Thank you. 
 agent: Thank you for choosing us.
book