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

Input: Consider Input: customer: Hello. 
 agent: Hello. How may I aid you? 
 customer: Can you please help me in booking a flight ticket from Orlando, MCO to Houston, HOU? 
 agent: May I know on which dates you are willing to travel? 
 customer: My journey dates are from Oct 31 to Nov 02. 
 agent: Do you have any other requirements? 
 customer: I prefer only economy class flight. 
 agent: May I know your name? 
 customer: My name is Nancy Davis. 
 agent: Sorry to inform you that unfortunately there is no flights available by the given details. 
 customer: Ok, that's not a problem. Thanks for your information. 
 agent: Thank you.

Output: no_flight


Input: Consider Input: customer: Hello, I am Deborah Clark. 
 agent: Hello, how can I help you today? 
 customer: I would like to travel from LGA to attend my business meeting. Could you please help me to book a ticket to SEA? 
 agent: Sure, please share your planned trip dates? 
 customer: My travelling dates will be on 07/12 to 07/14. 
 agent: Ok, any other requirements to be met? 
 customer: I need a connecting flight. 
 agent: Ok, please wait for a while. 
 customer: Ok. 
 agent: Thanks for waiting, we found a direct flight, shall I proceed? 
 customer: No, do not proceed. Thank you for your information. 
 agent: Ok, no issues. Thank you for reaching us.

Output: no_flight


Input: Consider Input: customer: Hello. 
 agent: Hello, how can I guide you for today? 
 customer: Will you please book me a flight ticket from DEN to AUS? 
 agent: Can you please share on what dates you are willing to travel? 
 customer: I will start on July 28th and return on July 30th. 
 agent: Are you looking for a connecting flight or direct flight? 
 customer: I need 1 stop over. 
 agent: Do you have any class preferences? 
 customer: No. 
 agent: Do you have any other requirements that you are looking for? 
 customer: No, I am fine with above essentials. 
 agent: Can you please provide your name to proceed further? 
 customer: I am Sandra Taylor. 
 agent: Sorry, there are no flights available at your request. 
 customer: That's alright, thanks for your assistance. 
 agent: Thank you for contacting us, have a nice day.
Output: no_flight