You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello.

USER: I am Alexander Green.

ASSISTANT: How may I render you today?

USER: I want to cancel my recent reservation due to some health issues. Can you aid me?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while, I will let you know.

USER: Sure.

ASSISTANT: Thanks for waiting, but no reservation was found on your name.

USER: That's ok, not an issue. Thank you.

ASSISTANT: Thank you.