Definition: 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: customer: Hello,. 
 agent: Hello. How can I assist you today? 
 customer: Can you please help me in booking my flight ticket from BOS to LGA? 
 agent: Sure, can you please share your travel dates? 
 customer: My planned travel dates are Oct 28-30. 
 agent: May I know your connection limit? 
 customer: I prefer a connecting flight. 
 agent: Do you have any other specification that you are looking for? 
 customer: I want to return in the morning. 
 agent: May I know your name to proceed further? 
 customer: Myself, Stephen Martin. 
 agent: I am sorry to inform you that there is no flight available at your request. 
 customer: Ok, no issues. Thank you for your service. 
 agent: Thank you for contacting us.
Output:
no_flight