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. 
 agent: Hello, how can I help you? 
 customer: Could you book my ticket in normal-cost airlines? 
 agent: Sure, may I know your travelling dates? 
 customer: My itinerary dates are Dec 15 and Dec 17. 
 agent: Ok, please share your airport codes. 
 customer: My genesis and terminus airport codes are CLT and MSP. 
 agent: Do you need any break in between the journey? 
 customer: I am looking for a connecting flight. 
 agent: Ok, can I know your name please? 
 customer: Robert Collins here. 
 agent: Please let us know if you have any other specifications. 
 customer: I have no other preferences. 
 agent: Ok, wait a minute please. 
 customer: Sure. 
 agent: Thank you for your time, sorry no flights found with your details. 
 customer: No problem, I will find an alternative way to travel. 
 agent: Thank you for reaching us, have a nice day.
A:
no_flight