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: Hello. 
 agent: Hello. May I know your good name? 
 customer: Nancy Phillips here. 
 agent: Ok. How can I help you? Nancy Phillips. 
 customer: I am planning to go Washington. Can you do the reservation? 
 agent: Ok. Can you share your airport codes of both locations? 
 customer: My airport codes are SFO-DCA. 
 agent: Ok. Do you have any limitations to travel? 
 customer: Yes, I need a connecting flight. 
 agent: Your trip dates, please. 
 customer: Dates are 01/16 and 01/18. 
 agent: Ok. Basing on your request, we can provide you a UA airline. And your flight number is 1023. May I proceed further? 
 customer: Carry on. 
 agent: Ok. Nancy Phillips, your ticket is booked and e-ticket will be generated to your mail. 
 customer: Thank you, Have a nice day. 
 agent: Thanks for reaching us, Have a nice day!.
A:
book