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: Hi. 
 agent: Hello. How can I assist you today? 
 customer: I am Karen Lee. I am planning to travel from HOU to SEA, can you help in booking  a flight? 
 agent: Definitely, I will help you with that booking. Please share your travelling dates. 
 customer: My travelling dates are 05/10 to 05/12. 
 agent: Just give a moment. 
 customer: Ok. 
 agent: Sorry, there is no flight available on your desired route. 
 customer: That's ok, thank you. 
 agent: Thank you for reaching us.
no_flight