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 may I help you? 
 customer: I have to change my existing reservation due to an emergency, can you please help me out? 
 agent: Sure, I can change your reservation right now. Before that I need to know your good name please? 
 customer: Thank you, I am Sharon Jackson here. 
 agent: Ok, please allow me a moment to check for the previous reservation in our database. 
 customer: Sure, take your time. 
 agent: Thanks for your time, we are sorry to say that there is no active reservation found on your name. 
 customer: Ok, thank you for your information. 
 agent: Thanks for opting us, wish you a great day. 
 customer: Thank you.
A:
no_reservation