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 can I guide you for today? 
 customer: I need to amend my reservation, can you help me out? 
 agent: Sure, I will help you about that. Can you please provide your name to check the reservation status under your name? 
 customer: Myself Joseph Baker. 
 agent: Sorry Joseph Baker, there is no active reservation under your name to change your reservation. 
 customer: That's ok, not an issues. Thank you. 
 agent: You are welcome, thank you for reaching us.
Output:
no_reservation