You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: I want to cancel my recent reservation due to my health issues. Can you help me for this one/.

ASSISTANT: Sure, may I know your name?

USER: Sure, Jack Lee here.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there are no active reservations on your given name to cancel.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for reaching our service.