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: Hi. 
 agent: Hello. How can I aid you? 
 customer: I would like to attend live music concert at Charlotte, can you please reserve fight ticket from OAK to CLT? 
 agent: Sure, may I know the planned travel dates? 
 customer: Sure, my planned travelling dates are Jul, 31 and Aug, 02 respectively. 
 agent: Do you have any connection limit for this journey? 
 customer: I prefer for direct flight in my journey. 
 agent: Please provide me the name. 
 customer: John Scott here. 
 agent: Sorry, there are no flights are available for your desired intent. 
 customer: Ok, not an issue.Thank you for your information. 
 agent: Thank you for reaching us.

Output: no_flight


Input: Consider Input: customer: Hello. 
 agent: Hello, how can I guide you for today? 
 customer: Can you help me to book a business class flight ticket? 
 agent: Can you please share on what dates you are willing to travel? 
 customer: My travel dates are May 05 and May 07. 
 agent: Can you please provide your source and destination airport codes? 
 customer: My airport codes are DEN and MSP. 
 agent: Do you have any airline preferences? 
 customer: I am comfortable with any airlines. 
 agent: Are you looking for a connecting flight or direct flight? 
 customer: I am looking for connecting flight. 
 agent: Do you have any other requirements that you are looking for? 
 customer: No, thanks for asking. 
 agent: Can you please provide your name to proceed further? 
 customer: My name is Thomas Scott. 
 agent: Sorry, there are no flights available at your request. 
 customer: No problem, thank you for the information. 
 agent: Thank you for contacting us, have a nice day.

Output: no_flight


Input: Consider Input: customer: Hello. 
 agent: Hello. 
 customer: I am Donald Collins. 
 agent: How can I help you? 
 customer: I am planning to book a ticket from LAX to IAH. Can you please help me out? 
 agent: Sure, may I know your travel dates please? 
 customer: I would like to travel on 04/21 and return back on 04/23. 
 agent: Ok, do you have any other specifications? 
 customer: My connection limit is 1. 
 agent: Please be on hold. 
 customer: Sure. 
 agent: I have searched for the flights with your details but unfortunately there are no flights available for you. 
 customer: Yes, you can proceed the booking. That's fine. Thank you. 
 agent: Thank you for choosing us.
Output: no_flight