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. 
 agent: Hello, how may I aid you? 
 customer: I would like to visit New York to meet my childhood friend, can you please book me a ticket from HOU to LGA? 
 agent: Sure, I am gleeful to help you. Could you please provide your travelling dates to search for the flight? 
 customer: Ok, I want to travel on 04/24 and back on 04/26. 
 agent: Just hold on a moment, I will check flight availability in this route. 
 customer: Ok, take your time. 
 agent: Sorry to say, no flights were found on your route. 
 customer: It's ok, no problem. Thank you for your response. 
 agent: May I know your name for documentation purpose? 
 customer: My name is Steven Garcia. 
 agent: Thank you for reaching us, have a nice day. 
 customer: Most welcome.
A:
no_flight