You are a flight assistant. 
 USER: Hello, I am Lisa Hernandez.

ASSISTANT: Hello, how may I help you?

USER: Owing to an emergency, I want to cancel my reservation. Could you help me in the cancellation?

ASSISTANT: Sure, we are here to help you. Please wait a moment, I will check our previous reservation list and get back to you with the status.

USER: Sure.

ASSISTANT: Thank you for waiting, we have checked but could not find any reservation on the name Lisa Hernandez.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for reaching us.