Given the task definition and input, reply with output. 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. How may I guide you today? 
 customer: I would like to book a ticket from IAH to LGA, can you please help me out? 
 agent: Sure, I am glad to help you with that. Can you please provide your preferable dates of travelling? 
 customer: I am travelling on these dates Jan 22nd and 24th. 
 agent: Do you have any connection limit? 
 customer: I need single connected flight. 
 agent: Any more specifications do you have? 
 customer: I don't have any other specifications. 
 agent: On whose name I have to book the flight ticket? 
 customer: Jonathan Walker here. 
 agent: I have found a flight with single connection between your journey having with the fare of 300 provided by Frontier airlines in economy class. Are you ok with this flight? 
 customer: Ok, you can proceed. 
 agent: Ok, your ticket has been confirmed in flight number 1029. 
 customer: Thank you for your services. 
 agent: Thank you for reaching us, have a great journey.
book