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 may I serve you now? 
 customer: Can you please change reservation due to climate issues? 
 agent: Ok. To change your reservation, may I have your name please? 
 customer: Brandon Miller is my name. 
 agent: Sorry, there was no reservation with your name. 
 customer: Ok, no issues. 
 agent: Thank you for reaching us. 
 customer: Thanks for your information.
Output:
no_reservation