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, I am Linda Mitchell. 
 agent: Hello, how can I help you today? 
 customer: Will you please reserve a seat to Las Vegas? 
 agent: Sure, I am glad to help you. 
 customer: Thank you. 
 agent: Help me with your airport codes? 
 customer: Origin airport code: OAK and destination is LAS. 
 agent: Kindly mention your trip dates? 
 customer: I have to attend the wedding anniversary of my friend, so please check flights on 04/09 and return flight on 04/11. 
 agent: There is a connecting flight 1028 in Hawaiian airline with price 200. Shall I reserve it? 
 customer: Do not proceed, as I choose to go with a direct flight. 
 agent: Ok. 
 customer: Thank you for the quick response. 
 agent: Thank you for approaching us.
A:
no_reservation