You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Robert Davis here.

ASSISTANT: How may I assist you?

USER: Due to some personal reason, I want to cancel my ticket. Can you do this for me?

ASSISTANT: Please wait a moment, I will check your reservation to cancel it.

USER: Sure.

ASSISTANT: There is no reservation found under name Robert Davis.

USER: It's fine. Anyway, thank you for your help.

ASSISTANT: Thanks for approaching us.