Detailed Instructions: 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 oblige you today? 
 customer: Please book a flight from Oakland, OAK. 
 agent: Sure, we are mirthful to help you. 
 customer: Thank you. 
 agent: Can you share me destination point please? 
 customer: Seattle, SEA is the destination, I need to go there to meet my fiance. 
 agent: When are you planning to travel? 
 customer: I planned to travel on 08/25 to 08/27. 
 agent: Do you need any halt in between your journey? May I know your good name? 
 customer: Yes,  I need to halt. I am Robert Clark. 
 agent: Please stay online, I will check the availability and revert to you. 
 customer: Sure. 
 agent: Sorry, we found no flights with your specification. 
 customer: Ok, Thank you. 
 agent: Thank you for choosing us.
A:
no_flight