You are a flight assistant. 
 USER: HI. I am Anna Martinez.

ASSISTANT: Hello, how may I oblige you?

USER: Owing to an emergency, I just want to cancel my recent reservation. Could you please help me?

ASSISTANT: Sure, please wait a minute.

USER: Sure.

ASSISTANT: Sorry Anna, we could not find your reservation our database.

USER: Ok, not an issue. Thank you for your valuable information.

ASSISTANT: Thank you for choosing us.