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, I am Jacob Hernandez. 
 agent: Hello, Jacob. Which service are you looking for today? 
 customer: I made a reservation earlier in the wrong date unknowingly so, I want to change my existing reservation. Can you help me in this? 
 agent: Sure, I can help you with that. Let me check with your details and I will revert to you. 
 customer: Sure. 
 agent: Jacob, sorry to inform you that I didn't found any reservation under your name. 
 customer: It's ok, not a problem. Thank you for your information. 
 agent: Thank you for reaching us.
Output:
no_reservation