Definition: 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
Input: customer: Hi. I am Eric Perez. 
 agent: Hello, how can I assist you today? 
 customer: Can you please help me in booking a flight ticket to OAK from MSP to attend a film festival? 
 agent: Sure, may I know your planned travel dates? 
 customer: My planned journey dates are from 07/01 to 07/03. 
 agent: Please wait for a moment. 
 customer: Sure. 
 agent: Sorry to say that, no flights were found with your given details. 
 customer: It's ok, no problem. 
 agent: Thank you for reaching us. 
 customer: Thank you for the information.
Output:
no_flight