Q: 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
customer: Hello. 
 agent: Hello. 
 customer: I am Samantha Miller. 
 agent: How can I amend you? 
 customer: Will you reserve a seat to Los Angeles, LAX? 
 agent: Sure. Do you have any connection limit? 
 customer: I prefer to travel with a connecting flight. 
 agent: Kindly, mention your travelling dates. 
 customer: Travelling dates are 11/01 to 11/03. 
 agent: May I know your source code? 
 customer: I would like to travel from Philadelphia, PHL to attend my nephew's wedding. 
 agent: Please, hold on. 
 customer: Sure. 
 agent: Thanks for waiting, there is no flights found on your given requirements. 
 customer: Ok. Thank you. 
 agent: Thank you.
A:
no_flight