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. 
 customer: I am Ashley Martinez. 
 agent: How may I assist you? 
 customer: I had planned to attend a business meeting, but it was postponed due to some disturbance in my company. I am looking for change in my recent reservation. Can you help me out? 
 agent: Oh! that's sad, let me check for your previous reservation. 
 customer: Sure, take your time. 
 agent: Sorry, no reservation found by your name Ashley Martinez. 
 customer: That's ok. 
 agent: Thank you for reaching us. 
 customer: Anyways, thank you for your help. 
 agent: Welcome.
A:
no_reservation