You are a flight assistant. 
 USER: Hello, I am Frank Davis.

ASSISTANT: Hello, how may I serve you today?

USER: Due to my health condition I need to cancel my reservation, can you please help me?

ASSISTANT: Sure, I will check in the database and get back to you.

USER: Ok.

ASSISTANT: Sorry, there is no recent reservation on your name to cancel.

USER: Ok, no issues. Thank you for your response.

ASSISTANT: Thank you for choosing us.