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

customer: Hello. 
 agent: Hello. How may I help you? 
 customer: Myself Gary King, can you help me to book a flight ticket from ORD to LGA. So I can visit the great water museum? 
 agent: Sure, can I know your preferable dates? 
 customer: Ok, please book for the dates 07/10 and 07/12 respectively. 
 agent: I found a flight from Hawaiian airlines with 1 connection and flight number is 1000. Shall I proceed? 
 customer: Ok, please book for me with that flight. 
 agent: Your ticket is booked. 
 customer: That is good, thank you for your help in booking the flight. 
 agent: Thank you for reaching us.
book