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
One example: customer: Hi. 
 agent: Hello. How can I help you? 
 customer: I would like to change my existing reservation as my plan to go for a holiday trip got postponed. Can you please help me with this? 
 agent: Sure, may I know your name please? 
 customer: My name is Anthony Phillips. 
 agent: Please wait a moment. 
 customer: Sure. 
 agent: Unfortunately there is no reservation found with your given name. 
 customer: Not a problem, thank you for checking. 
 agent: Thank you for choosing us.
Solution is here: no_reservation
Explanation: Here the customer has not asked for any booking, he just wanted to update his already booked flight, so the status would be no_reservation

Now, solve this: customer: Hello. My name is Timothy Wright. 
 agent: Hello, how may I help you? 
 customer: I want to change my reservation, could you help me out? 
 agent: Sure, give me a moment please. 
 customer: Sure, take your time. 
 agent: Thank you for waiting. I am so sorry to say that I did not find the reservation on your name. 
 customer: That's ok. 
 agent: Thank you for reaching us. Hope to serve you better next time. 
 customer: Thank you, have a good day.
Solution:
no_reservation