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: Can you please help me in booking my flight ticket from PHL to PHX to meet my grand parents. 
 agent: Sure, please share your planned trip dates? 
 customer: I want to travel from June 02-04. 
 agent: Do you have any connection limit? 
 customer: I prefer to fly in connected flight. 
 agent: Any other requirements to be met? 
 customer: I want to depart in the evening. 
 agent: May I know your good name? 
 customer: Scott Campbell. 
 agent: Sorry, there are no flights found with your given details. 
 customer: Ok, no issues. Thank you for your help. 
 agent: Thank you for reaching us.
Student:
no_flight