You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I serve you today?

USER: I intend to cancel my reservation due to some health issues. Can you help me cancel my reservation which was made on the name of Linda Green?

ASSISTANT: Ok, wait a moment I will check weather the reservation is available or not.

USER: Ok.

ASSISTANT: Thanks for waiting, unfortunately there is no reservation found o this name.

USER: That's ok, thank you for the information.

ASSISTANT: Thanks for choosing us.