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
Q: customer: Hi. I am Emily Perez. 
 agent: Hello, how may I aid you today? 
 customer: Can you help me in booking from AUS to LGA, as there is a musical concert? 
 agent: Sure, let me know your planned dates of journey. 
 customer: My trip dates are 03/18 to 03/20. 
 agent: Ok, please wait a minute. 
 customer: Sure. 
 agent: Thank you for your time. Do you need a connection within your journey? 
 customer: I need a connecting flight. 
 agent: Ok. There are no connecting flights found according to your requirements. 
 customer: No issue, thank you. 
 agent: Thank you for availing us.
A:
no_reservation