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, how can I help you? 
 customer: I want to travel from EWR to AUS. My travelling dates are from 07/14 to 07/16. 
 agent: Ok, please wait for a moment. 
 customer: Make sure that there is 1 connection. 
 agent: Sorry, there are no flights available regarding your journey. 
 customer: That's ok. 
 agent: Do you want any other information please? Ok. Thank you and have a nice day. May I know your name please? 
 customer: Gary Allen here. Thank you for your support.

A: no_flight
****
Q: customer: Hello. 
 agent: Hello, how can I assist you today? 
 customer: Can you help me to book a flight ticket from MCO to LGA? 
 agent: Sure, may I know your planned travel dates? 
 customer: My travel dates are Feb 22 and Feb 24. 
 agent: Do you want connecting flight? 
 customer: I prefer direct flight for this trip. 
 agent: Do you have any other requirements? 
 customer: No, thanks for asking. 
 agent: May I know your name please? 
 customer: I am Christopher Martinez. 
 agent: Sorry, there are no flights found with your given details. 
 customer: No problem, thank you for the information. 
 agent: Thank you for opting us.

A: no_flight
****
Q: customer: Hello. 
 agent: Hello. How may I assist you? 
 customer: I am looking for a direct flight for my journey, can you please check out is there any flight available for me? 
 agent: Sure, I will help you. Can I have your planned travel dates please? 
 customer: Thank you for accepting my request, my boarding is on May 30 and please book my return ticket on June 01. 
 agent: May I know your origin and destination airport codes please? 
 customer: Sure, I want to travel from EWR to DTW. 
 agent: Can I have your name please? 
 customer: Sure, my name is Catherine Lewis. 
 agent: May I know your depart and return timings? 
 customer: I can manage with any timings. 
 agent: Do you have any other specifications? 
 customer: No. 
 agent: Catherine Lewis, no flights has been found on your planned travel dates. 
 customer: Oh! Sad to hear that. Anyway, I will find another alternative. Thank you for the information. 
 agent: Thank you for approaching us. 
 customer: Welcome.

A:
no_flight
****