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

Let me give you an example: 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.
The answer to this example can be: no_reservation
Here is why: 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

OK. solve this:
customer: Hello, I am Ruth Martinez. 
 agent: Hello, how may I serve you today? 
 customer: I want to conduct an musical event at CA-SFO. Could you please help me with booking a flight ticket? 
 agent: Sure, may I know your price limit? 
 customer: My price limit should be under 5000. 
 agent: Do you need any connection limit? 
 customer: Yes, I need a single connection in between the journey. 
 agent: Please provide your journey points? 
 customer: Sure, my origin is AZ-PHX. 
 agent: To process further we need your travelling days? 
 customer: Sure, I intent to fly on 05/09 and return on 05/11. 
 agent: Thank you for your information. We found a flight 1013 in Southwest airlines which matches your specifiactions. Shall I proceed? 
 customer: Yes, please proceed. 
 agent: Your ticket has been confirmed. 
 customer: Ok, thank you for your quick response. 
 agent: Thank you for availing with us.
Answer:
book