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: I am Betty Williams, help me to book a flight ticket on 08/18 to meet my step father at Philadelphia. Can you book a return ticket on 08/20? 
 agent: Sues, may I know your price limit for this journey? 
 customer: My budget is 5000 for flight ticket. 
 agent: Ok, please provide me your airport codes. 
 customer: I will fly from Orlando, FL-MCO to PA-PHL. 
 agent: Ok, let me check the availability on your route. 
 customer: Sure. 
 agent: Betty, Frontier airline is available with price 100 with single connection. Shall I proceed? 
 customer: Sure. 
 agent: Reservation has been done in 1028 flight. 
 customer: Thank you for helping me with booking. 
 agent: Thank you for opting us.

A: book
****
Q: customer: Hello. 
 agent: Hello. How can I help you? 
 customer: I want to celebrate my mother birthday, I would like to book a ticket. 
 agent: May I know the journey details? 
 customer: My source airport code is EWR and my destination airport code is LGA. 
 agent: Help me with the dates. 
 customer: My prefer dates are from 07/24 to 07/26. 
 agent: May I know the name? 
 customer: My name is Amanda Scott. 
 agent: Sorry, no flight found. 
 customer: Ok, no issue. 
 agent: Thank you. 
 customer: Thank you for your information.

A: no_flight
****
Q: customer: Hi. 
 agent: Hello, how may I aid you for the day? 
 customer: As my scheduled holiday trip got cancelled, I need your help in cancelling my reservation. 
 agent: Sure, I am here to help you. May I know your name to cancel the reservation? 
 customer: I am Paul Mitchell. 
 agent: Ok, I will check the recent reservation on your name and get back to you. 
 customer: Ok. 
 agent: There is no reservation found on your name to cancel. 
 customer: Ok, thanks for the information. 
 agent: Thank you for contacting us. Have a great day.

A:
no_reservation
****