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 assistance to you? 
 customer: Please book a ticket from HOU to DEN to attend an interview. 
 agent: Sure, we are here to help you. May I know your travel dates? 
 customer: My travelling dates are Oct 15 and Oct 17. 
 agent: Do you need any way station in your journey? 
 customer: I want single way station. 
 agent: At what time, would you like to travel? 
 customer: I am comfortable with any time. 
 agent: Do you have any other requirements? 
 customer: No. 
 agent: May I know your good name please? 
 customer: I am Edward Collins. 
 agent: There is a connecting flight with fare of 100 and 1024 flight number. Shall I proceed? 
 customer: Ok, please proceed. 
 agent: Your seat has been reserved with Spirit airlines in economy class. 
 customer: Thank you. 
 agent: Thank you for choosing us.
Solution:
book