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

customer: Hello. 
 agent: Hello, how may I help you? 
 customer: I am George Hall, want to travel from IAH to SFO>. 
 agent: May I know your trip dates? 
 customer: My travel dates are from 06/05 to 06/07. Please check the flight with 1 connection. 
 agent: There is no reservation found under your name. 
 customer: It's ok, thank you. 
 agent: Most welcome.
no_flight

customer: Hi. 
 agent: Hello, how may I aid you? 
 customer: I am Stephen Young. I am planning to visit some new places at Orlando, help me in booking my flight ticket with one halt. 
 agent: Sure, can you please share your travelling dates? 
 customer: My travelling dates will be 12/26 to 12/28. 
 agent: May I know your airport codes? 
 customer: I would like to start my journey from TX-DFW. My landing airport will be FL-MCO. 
 agent: Thanks for providing your details. Unfortunately there are no flights found with your requirements. 
 customer: Its ok, thank you for your assistance. 
 agent: Thank you for choosing us.
no_flight

customer: Hello. 
 agent:  Hello, may I know how best I can help you today? 
 customer: Owing to an emergency, I want to change my reservation. Can you please help me with that? 
 agent: Sure, may I know your name? 
 customer: My name is Emily Davis. 
 agent: Please wait a moment. 
 customer: Ok. 
 agent: Sorry to inform, no reservation found with your name. 
 customer: Thank you for the service. 
 agent: Thanks for reaching us.
no_reservation