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. 
 agent: Hello. How can I help you? 
 customer: Myself Linda Thomas. I want to visit a trip.I just want to book a ticket. 
 agent: Sure. Help me with the full details of journey. 
 customer: My airport codes are from PA-PHL to NV-LAS. 
 agent: May I know the dates? 
 customer: My dates are from 08/09 to 08/11. 
 agent: Sorry, there is no flight found. 
 customer: Ok, thank you for your help. 
 agent: There is a flight with connection 1 and airline is UA. Can I book it? 
 customer: Ok. 
 agent: Your ticket is booked with number 1029. Thank you. 
 customer: Thank you for your help.
Solution:
book