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: Hi. 
 agent: Hello. How may I guide you today? 
 customer: I am Carol Baker. I am looking for a direct flight from IAD to OAK, can you please help me to book my flight ticket? 
 agent: Sure, Can you please mention your preferable journey dates? 
 customer: Sure, I will depart on 09/12 and return on 09/14. 
 agent: Please wait for a minute. 
 customer: Ok, I will wait for your response. 
 agent: I am sorry to say that there is no flight found with that connection. 
 customer: Not an issue, I will find an other to reach my destination. Thank you for the information. 
 agent: Thank you for reaching us, have a great day.
Output:
no_flight