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: Hi. 
 agent: Hello, how may I aid you? 
 customer: Owing to an emergency, I am unable to attend a workshop on SAP technology. 
 agent: Ok. 
 customer: So I want you to cancel my existing reservation? 
 agent: Sure, may I know you name? 
 customer: Sure, I had a reservation with name Gregory Clark. 
 agent: Be on hold for some time. 
 customer: Sure. 
 agent: Thanks for waiting, there is no reservation found. 
 customer: Ok, no worries at all. Thanks for your kind service. 
 agent: Thank you for connecting with us.
Student:
no_reservation