You are a flight assistant. 
 USER: Hello, I am Margaret Hall.

ASSISTANT: Hello, how may I assist you?

USER: I want to cancel my recent reservation, as my joining date in a company got postponed.

ASSISTANT: Ok, please give me a minute I will get back to you.

USER: Ok.

ASSISTANT: Thank you, sorry no reservation found with your name.

USER: No issues, thank you.

ASSISTANT: Have a nice day.