Q: 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
customer: Hello. 
 agent: Hello, how can I help you? 
 customer: Can you please help me to cancel me existing reservation as I am sick and unable to travel? 
 agent: Sure, we can help you on that. 
 customer: Thank you. 
 agent: Please help me with your name to check your details in our database. 
 customer: My name is Eric Jackson. 
 agent: Please give me a moment. 
 customer: Sure. 
 agent: Eric Jackson, there is no reservation found on your name. 
 customer: No problem, thank you. 
 agent: Thank you for reaching us.
A:
no_reservation