You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: Owing to an emergency, I want to cancel my recent reservation. Can you help me out?

ASSISTANT: Sure, I am oblige to help you in that one. Please give me a moment.

USER: Ok, please check the details on the name of Justin Miller.

ASSISTANT: I have checked based on your request but I am unable to find your name in our previous ticket booking list to help you out in cancellation.

USER: That's ok, thank you.

ASSISTANT: You are most welcome and have a nice da.