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. I am Michael Lee, arranging a surprise party to my dearest friend on the occasion of her birthday. 
 agent: Hello, how may I aid you today? 
 customer: Please book a flight on 03/17 with one connection. 
 agent: Sure, may I know your airport codes? 
 customer: Origin- destination: IAH -LAS. My arrival date is on 03/19. 
 agent: Thanks for waiting, there are no flights found on your given requirements. 
 customer: Thank you. 
 agent: Thank you.

A: no_flight
****
Q: customer: Hi. 
 agent: Hello, how may I support you? 
 customer: Actually I have planned a trip to enjoy my weekend. But, unfortunately I have met with illness. So, I need to cancel my ticket. Can you help me with cancellation? 
 agent: Sure, I will help you. Can I have your name please? 
 customer: Donna Phillips, is my name. 
 agent: Ok, just a moment. 
 customer: Sure. 
 agent: Thanks for your time, no reservation was found based on your good name. 
 customer:  Ok, not a problem. Thanks for your kind information. 
 agent: Thank you for selecting us.

A: no_reservation
****
Q: customer: Hi,. 
 agent: Hello, how may I assist you for the day? 
 customer: I want to cancel my recent reservation, due to the sudden work assigned by my manager at office. Can you help me with that? 
 agent: Sure, I am blissful to help you. Can you please provide your name? 
 customer: Sure, William Jackson is my name. 
 agent: Ok, please wait I will check the reservation on your name and revert to you. 
 customer: Sure, I will wait. 
 agent: Ok. Sorry, there is no reservation found on your name. 
 customer: That's ok, thanks for your assistance. 
 agent: Thank you for reaching us.

A:
no_reservation
****