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, how can I guide you for today? 
 customer: I want to cancel my recent reservation due to sudden cancellation my trip. Can you help me? 
 agent: I will help you with that. 
 customer: Thank you. 
 agent: May I know your name? 
 customer: Ashley Davis. 
 agent: Please give me a minute, I will check the status of your existing reservation. 
 customer: Ok. 
 agent: Sorry, there is no reservation found under your name in our database. 
 customer: That's Fine. Thank you. 
 agent: Thank you for contacting us, have a nice day.
A:
no_reservation