Instructions: 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. I am George Thomas. 
 agent: Hello, how can I serve you? 
 customer:  I want to cancel my recent reservation, because I want to travel  with my friends by road. 
 agent: Ok. 
 customer: So, can you help me with it? 
 agent: Sure, I am here to help you. 
 customer: Thank you. 
 agent: Please wait for a while, I will check your reservation. 
 customer: Ok. 
 agent: Thank you for your time, there is no reservation found on your name. 
 customer: That's ok. Thank you for the response. 
 agent: Thank you for availing us.
Output:
no_reservation