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. 
 customer: I am Nancy Adams. 
 agent: How can I help you Adams? 
 customer: I would like to change my recent existing reservation because my friend who is participating in gun shooting has been postponed. 
 agent: I will help you, please wait a while. 
 customer: Ok. 
 agent: There is no reservation found on your name, Nancy Adams. 
 customer: No problem, thank you. 
 agent: Thanks for opting us.
Output:
no_reservation