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, What kind of help are you expecting from our side?
customer: Can you please help me in flight ticket booking process from LGA to PHL?
agent: Sure, I am euphoric to help you with booking. May I know on which dates you are planning to start and return?
customer: Thank you for your response, I want to take off on Jan 22 and book my return ticket also on Jan 24.
agent: Do you prefer any way station in between journey?
customer: I will prefer 1 break in between my journey.
agent: May I know your good name please?
customer: Sure, my name is Betty Nelson.
agent: Is there any other specifications regarding your journey?
customer: I want to travel in economy class flight.
agent: Ok, please wait a moment. let me search a flight for you.
customer: Ok.
agent: Thank you for your time, we have found a American airline, flight number-1009, connections-1 and ticket-100. Would you like me to book the ticket?
customer: Please confirm this flight ticket for me.
agent: Sure, a seat has been reserved successfully for a economy class flight.
customer: Thank you for your help.
agent: Thank you for your presence. We hope to serve you again.
book