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: Hello,. I am Sandra Wright. 
 agent: Hello, how can I help you? 
 customer:  I am a Guitarist want to visit Philadelphia for celebrating Music festival, can you please book me a flight ticket? 
 agent: Sure, please share me your travelling dates? 
 customer: I want to travel on 08/27, and need to catch return flight on 08/29. 
 agent: Kindly assign me your airport codes? 
 customer:  I need to leave from my nearest airport MSP to reach PHL. 
 agent: Do you have any specifications? 
 customer: I need a direct flight. 
 agent: Please wait a minute. 
 customer: Sure. 
 agent: Sorry, there are no flights with your specifications. 
 customer: Ok, no issues. Thanks for the information. 
 agent: Thank you for reaching us.
A:
no_reservation