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: Hello, I am William Jackson. 
 agent: Hello, how may I serve you? 
 customer: I want to attend my friend birthday party at Phoenix, so could you please help me in booking? 
 agent: Sure, may I know when you are willing to travel? 
 customer: I am willing to travel on 10/09 and return on 10/11. 
 agent: Do you have any specifications? 
 customer: I need a stopover in my journey. My price should be 200. 
 agent: Please share your airport codes? 
 customer: My boarding is New York, NY-LGA  landing at Phoenix, AZ-PHX. 
 agent: Sorry, we did not found a connecting flight matching with your requirements. 
 customer: No problem, thank you for the information. 
 agent: Thank you for contacting us, have a nice day.
Solution:
no_reservation