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: Hi. I am Samuel Baker. 
 agent: Hello, how may I assist you today? 
 customer: I want to change my reservation owing an emergency. 
 agent: Sure, we are glad to serve you. Please wait for a while, let me check your reservation with us. 
 customer: Ok. 
 agent: Thanks for your time, unfortunately no reservation found with your name. 
 customer: Ok, thank you for your service. 
 agent: Thank you for availing us, have a great day ahead.

A: no_reservation
****
Q: customer: Hello,. I am Jennifer Edwards. 
 agent: Hello, how can I serve you today? 
 customer: As I am a journalist I want to collect some data from library of congress at Washington, DCA. 
 agent: OK. 
 customer: Can you please help me in booking from Austin, AUS? 
 agent: Sure, I can help you. 
 customer: Thank you. 
 agent: May I know your travel dates that you wish to travel? 
 customer: My journey start on 05/22 and I need to catch return flight on 05/24. 
 agent: Ok, please wait for sometime. I will revert you with available flights. 
 customer: Sure. 
 agent: Thanks for waiting, there is a flight in UA airline with fare 300 is available for you. Shall I proceed to book? 
 customer: No do not proceed. My price limit is 200. 
 agent: Ok, no problem. 
 customer: Thank you for your information. 
 agent: Thanks for consulting us, have a nice day.

A: no_flight
****
Q: customer: Hi. 
 agent: Hello, how can I guide you for today? 
 customer: Can you please help me in changing my recent reservation? 
 agent: I will help you with that. 
 customer: Ok. 
 agent: May I know your name? 
 customer: Myself Amanda Rodriguez. 
 agent: Please give me a minute, I will check the status of your existing reservation. 
 customer: Ok. 
 agent: I successfully found your existing reservation. May I know your changed travelling dates? 
 customer: My travelling dates are June 14 and 16. 
 agent: Can you please provide your source and destination airport codes? 
 customer: My airport codes are IAD and EWR. 
 agent: Are you looking for a connecting flight or direct flight? 
 customer: I need connecting flight. 
 agent: Do you have any other requirements that you are looking for? 
 customer: I need my depart flight ticket at evening time and my return ticket is at afternoon time. 
 agent: Sorry, there are no flights available at your request. 
 customer: Thanks for your information. 
 agent: Thank you for contacting us, have a nice day.

A:
no_flight
****