You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: My name is Karen Martinez. Owing to emergency, I need to cancel my recent reservation. Please help me with that.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

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

USER: No problem, thanks for your information.

ASSISTANT: Thank you for choosing us.