Detailed Instructions: 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
Problem:customer: Hi. 
 agent: Hello, how can I assist you today? 
 customer: I am Karen Turner. Can you please book a direct flight for me? 
 agent: Sure, when you are willing to travel? 
 customer: I am planning to travel on 10/29 and 10/31. 
 agent: Can you provide me your leaving point and heading point? 
 customer: My preferred airport codes are OAK and PHX. 
 agent: Ok, wait for some time. 
 customer: Sure, take your time. 
 agent: Unfortunately there is no flights found on your details. 
 customer: That is fine, not an issue. 
 agent: Thanks for approaching us. 
 customer: Thank you.
Solution:
no_flight