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. 
 customer: Kimberly Martin here. 
 agent: How can I assist you at this moment? 
 customer: I have to cancel my reservation which I have done earlier to participate in dance programme but unfortunately I have stay back here to take care of my grandmother. Can you please help me out with cancelling of my reservation? 
 agent: Sure Martin, I will help you with that. 
 customer: Thanks. 
 agent: Please wait a moment to check your reservation status. 
 customer: Ok, I will wait. 
 agent: Sorry Kimberly Martin, no reservation has found under your name to cancel. 
 customer: Anyway, thanks for the information. 
 agent: Thank you for choosing us, have a great day.
[A]: no_reservation


[Q]: customer: Hello. 
 agent: Hello. How may I help you? 
 customer: I am Matthew Allen, want to travel from EWR to HOU. Will you please help me in booking my ticket? 
 agent: Sure, can you provide your travel dates? 
 customer: My travelling dates will be from 04/17 to 04/19. 
 agent: Please wait. 
 customer: Sure. 
 agent: Thank you for your patience, there is a flight for you with number 1027 in JetBlue airline. Shall I proceed? 
 customer: Great, please proceed with the booking. 
 agent: Sure, your ticket has been booked. 
 customer: Thank you for your service. 
 agent: Thank you for reaching us.
[A]: book


[Q]: customer: Hello. 
 agent: Hello. How may I assist you? 
 customer: Can you help me to book a flight ticket from OAK to LAX? 
 agent: Sure, I will help you. May I know your planned journey dates please? 
 customer: Ok, please for the dates Sept 3rd and Sept 5th respectively. 
 agent: Can I have your name please? 
 customer: Yes, my name is Melissa Perez. 
 agent: Do you have any connection preference? 
 customer: Ok, please book a connecting flight. 
 agent: May I know your class preference? 
 customer: Yes, I need a economy class flight. 
 agent: Do you have any other preferences? 
 customer: Ok, please check for a flight which depart during evening. 
 agent: Melissa Perez, no flights has been found on your specifications. 
 customer: Ok, that is not a problem. Thank you for assisting me. 
 agent: Thank you for choosing us.
[A]:
no_flight