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: I am Rebecca Nelson. 
 agent: Nelson, how may I assist you? 
 customer: I am looking for a direct flight, could you please help me with that? 
 agent: Sure, may I know your itinerary dates? 
 customer: I would like to take off on 11/29 and return on 12/01. 
 agent: Please share your origin and destination airport codes. 
 customer: My nearest source airport code is JFK and destination airport code is PHX. 
 agent: Please give me a moment to check for a best flight. 
 customer: Sure, take your time. 
 agent: Frontier airlines with flight 1004 having 1 connection is providing service on your route. 
 customer: I am looking for a direct flight. 
 agent: Let me check. Sorry, no direct flight is available. 
 customer: That's ok, not an issue. 
 agent: Thank you for contacting us. 
 customer: Anyways, thank you for the information.
[A]: no_flight


[Q]: customer: Hi,. 
 agent: Hello. 
 customer: My name is Elizabeth Wilson. 
 agent: How may I assist you? 
 customer: Can you please book a flight ticket with in the range of 200 from Seattle? 
 agent: Sure, may I know on which dates you would like to travel? 
 customer: Sure, 09/12 - 09/14 are my travelling dates. 
 agent: Help me with the airport codes? 
 customer: My source code is WA - SEA and destination code is Houston, TX - IAH. 
 agent: Sorry, we do not found any flights running in your given details. 
 customer: Ok, not a problem. Thank you. 
 agent: Thank you for reaching us.
[A]: no_flight


[Q]: customer: Hello. 
 agent: Hello, how can I help you? 
 customer: My exam has been postponed, so I want to reschedule my itinerary dates. 
 agent: Sure, may I know your name? 
 customer: Donna Martin here. 
 agent: Ok, please wait. 
 customer: Sure. 
 agent: Thanks for waiting, there is no active reservation on your name. 
 customer: No problem, thank you. 
 agent: Thank you.
[A]:
no_reservation