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

[EX Q]: customer: Hello. 
 agent: Hello, how may I assist you? 
 customer: I am Justin Lee. Can you help booking a flight ticket from LGA to ATL? 
 agent: Sure, may I know your planned travel dates please? 
 customer: I will start on 01/03 and return on 01/05. 
 agent: Would you like to travel in a connecting flight or a direct flight? 
 customer: I am comfortable with any flight. 
 agent: Do you have any other specifications? 
 customer: I need to depart in the morning time. 
 agent: Sorry, there is no flight available on your requested dates. 
 customer: No problem, thank you for the information. 
 agent: Thank you for reaching us.
[EX A]: no_flight

[EX Q]: customer: Hi. I am Samuel Baker. 
 agent: Hello, how may I assist you today? 
 customer: I want to change my reservation owing an emergency. 
 agent: Sure, we are glad to serve you. Please wait for a while, let me check your reservation with us. 
 customer: Ok. 
 agent: Thanks for your time, unfortunately no reservation found with your name. 
 customer: Ok, thank you for your service. 
 agent: Thank you for availing us, have a great day ahead.
[EX A]: no_reservation

[EX Q]: customer: Hello. 
 agent: Hello. How can I address you today? 
 customer: I would like to attend a meeting at Washington, please help me in booking a ticket from ATL to IAD. 
 agent: Sure, to book a ticket can I know your travelling dates? 
 customer: My planned travel dates are on July 1 and July 3. 
 agent: Is there any other requirements? 
 customer: I would like to return in the evening. 
 agent: Please provide your name. 
 customer: My name is Charles Jackson. 
 agent: Unfortunately there is no flight found with your given information. 
 customer: Ok, no issues. Thank you for your information. 
 agent: Thank you.
[EX A]:
no_flight