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

Example input: customer: Hi. 
 agent: Hello. How can I help you? 
 customer: I would like to change my existing reservation as my plan to go for a holiday trip got postponed. Can you please help me with this? 
 agent: Sure, may I know your name please? 
 customer: My name is Anthony Phillips. 
 agent: Please wait a moment. 
 customer: Sure. 
 agent: Unfortunately there is no reservation found with your given name. 
 customer: Not a problem, thank you for checking. 
 agent: Thank you for choosing us.
Example output: no_reservation
Example explanation: Here the customer has not asked for any booking, he just wanted to update his already booked flight, so the status would be no_reservation
Q: customer: Hello. 
 agent: Hello. How may I assist you? 
 customer: Can you help me to book a flight ticket from EWR to PHL? 
 agent: Sure, may I know your planned travel dates please? 
 customer: I want to take off on 11 July and return on 13 July. 
 agent: May I know your name please? 
 customer: I am Jennifer Rodriguez. 
 agent: Do you need a connecting flight or a direct flight? 
 customer: I am ok with any connecting. 
 agent: May I know your class preference? 
 customer: No. 
 agent: Do you have any other specifications? 
 customer: No. 
 agent: I found an economy class in Hawaiian airlines with fare 100 and it has single connection. Can I book your ticket? 
 customer: Please proceed. 
 agent: Ok, your booking is confirmed with flight number 1016. 
 customer: Thanks for helping me. 
 agent: Thank you for approaching us.
A:
book