Teacher: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
Teacher: Now, understand the problem? Solve this instance: customer: Hello. 
 agent: Hello, how may I assist you today? 
 customer: I am Benjamin Harris. I would like to visit Shri Lakshmi Narayan Mandir at New York. Can you please help with single connection. 
 agent: Sure, can you please provide your journey dates? 
 customer: Sure, my depart is on 09/04 and return on 09/06. 
 agent: Ok, may I know your airport locations? Ok, please wait a moment. 
 customer: My airport location is Seattle, WA - SEA. 
 agent: Can I have your airport codes? Ok, please wait. 
 customer: OK. 
 agent: Thanks for your time, sorry, no flight found on that day. 
 customer: No problem, thank you for the information. 
 agent: Thank you for approaching us.
Student:
no_flight