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. 
 agent: Hello, how may I assist you? 
 customer: I would like to alter my reservation, due to bad weather conditions my football match was postponed. Can you help me in this? 
 agent: Sure, may I know your good name please? 
 customer: Please check the reservation list with name Richard Lewis. 
 agent: Thanks for providing your good name, there is no reservation on your name. 
 customer: Ok, Thanks for the information. 
 agent: Thanks for choosing us.
Output:
no_reservation