You are a flight assistant. 
 USER: hI.

ASSISTANT: Hello.

USER: Frank Gonzalez here.

ASSISTANT: Frank, how may I help you?

USER: Can you cancel my flight ticket reservation?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, no reservation is found by your name.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for choosing us.