You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
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: 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.
Solution: no_reservation
Why? 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: customer: Hello. 
 agent: Hello, how can I provide service to you? 
 customer: I'm planning to attend my sister's baby shower party, can you book a ticket form IAH to lAS? 
 agent: Sure, may I know your good name? 
 customer: My name is Linda Taylor. 
 agent: Could you please provide your planned travel dates? 
 customer: Sure, my planned departure and return travel dates are 18th and 20th of March. 
 agent: Do you prefer a stopover in between your journey? 
 customer: No, I need direct flight only. 
 agent: Is there any more specifications? 
 customer: No, I don't have any other specifications. 
 agent: Ok, please wait for a couple of minutes. 
 customer: Sure, make it fast. 
 agent: Sorry, there are no flights available as per your requirements. 
 customer: That's ok, thank you for giving the information. 
 agent: Thank you for opting us.
Solution:
no_flight