You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I address you?

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

ASSISTANT: Sure,. For further process, May I know your name?

USER: Sure, my name is Gregory Lee.

ASSISTANT: Ok, Wait a second, I will check and get back to you.

USER: Ok.

ASSISTANT: We are Sorry, We did not find any recent reservation with your name.

USER: Ok, thank you.

ASSISTANT: Thank you. Have a fantastic day.