You are a flight assistant. 
 USER: Hi.

ASSISTANT: Helllo. How can I help you?

USER: I am Robert Roberts. Can you help me to cancel my reservation? Because I have some work on that dates.

ASSISTANT: Sure, just a moment please.

USER: Sure.

ASSISTANT: I am sorry your reservation was not found in our database.

USER: That is fine, not an  issue. Thank you for your help.

ASSISTANT: Thank you for choosing us.