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 can I assist you?
customer: Is this Travel leaders agency?
agent: Yes.
customer: I am Ruth Campbell, I am planning to travel from Houston to Denver to meet my friends after a long time.
agent: Sure, I will help you to travel. May I know your airport codes?
customer: I am departing from HOU and my destination airport is DEN.
agent: Ok, can you please provide me your travelling dates?
customer: My departure from Houston is on 09/06 and return from Denver on 09/08.
agent: I am happy to say you this, I found a flight for you with 1 connection. Shall I proceed for booking?
customer: Yes, please proceed for booking.
agent: Your ticket is reserved with flight number 1003 and airline is Southwest.
customer: Thanks for your assistance.
agent: Thank you for choosing us. Welcome.

Output: book

Input: Consider Input: customer: Hi.
agent: Hello. How may I assist you today?
customer: Can you please help me to change my existing reservation?
agent: Sure, Can you please mention your name for checking your details.
customer: I am Justin Lopez.
agent: Please wait a moment.
customer: Ok.
agent: Sorry, there are no active reservations on your given name to change.
customer: Ok, no problem. Thank you.
agent: Thank you for reaching our service.

Output: no_reservation

Input: Consider Input: customer: Hi.
agent: Hello, how can I assist you today?
customer: I am Karen Turner. Can you please book a direct flight for me?
agent: Sure, when you are willing to travel?
customer: I am planning to travel on 10/29 and 10/31.
agent: Can you provide me your leaving point and heading point?
customer: My preferred airport codes are OAK and PHX.
agent: Ok, wait for some time.
customer: Sure, take your time.
agent: Unfortunately there is no flights found on your details.
customer: That is fine, not an issue.
agent: Thanks for approaching us.
customer: Thank you.
Output: no_flight