Given the task definition, example input & output, solve the new input case.
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
Example: customer: Hi. 
 agent: Hello. How can I help you? 
 customer: I would like to change my existing reservation as my plan to go for a holiday trip got postponed. Can you please help me with this? 
 agent: Sure, may I know your name please? 
 customer: My name is Anthony Phillips. 
 agent: Please wait a moment. 
 customer: Sure. 
 agent: Unfortunately there is no reservation found with your given name. 
 customer: Not a problem, thank you for checking. 
 agent: Thank you for choosing us.
Output: no_reservation
Here the customer has not asked for any booking, he just wanted to update his already booked flight, so the status would be no_reservation

New input case for you: customer: Hello. 
 agent: Hello. 
 customer: Steven Scott here. 
 agent: How may I aid you at this moment? 
 customer: I'm planning to meet my friend, please book a ticket from LAS to ORD. 
 agent: Sure, please share your travelling dates. 
 customer: Sure, my planned departure and return travel dates are 17th and 19th of January. 
 agent: Ok, do you need any lay by in between the journey? 
 customer: I'm looking for flights with 1 connection. 
 agent: Ok, may I know your class preference? 
 customer: I don't have any class preference but my depart time must be afternoon and return time must be evening. 
 agent: Ok, do you have any other preferences? 
 customer: No, I don't have any other specifications more than that. 
 agent: There are no flights found on your requested dates. 
 customer: That's ok, thank you for your information. 
 agent: Thank you for reaching us.
Output:
no_flight