Teacher: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
Teacher: Now, understand the problem? Solve this instance: customer: Hello. My name is Ronald Hernandez. 
 agent: Hello Ronald. Hope you are doing good today. How may I help you? 
 customer:  I had planned to go on a vacation, but it was postponed.Can you change my recent reservation? 
 agent: Oh sure. Let me find your details from the system. 
 customer: Ok. 
 agent: Hey Ronald, it seems there has been no reservation done under your name. Would like to talk to any of our booking agent maybe? 
 customer: No, thank you. 
 agent: Okay. I hope you have a wonderful day ahead. Thank you for reaching out to us. 
 customer: Thank you.
Student:
no_reservation