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
Q: customer: Hi. 
 agent: Hello,. 
 customer: I am Patrick Davis. 
 agent: How can I assist you? 
 customer: I am unable to travel right now due to health issues, so can you help me for cancelling my existing reservation? 
 agent: Sure, we are here to help you. 
 customer: Thank you. 
 agent: There is no reservation found on your name for cancellation. Thank you for opting us. 
 customer: Oh! no problem, thank you for your services.
A:
no_reservation