You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: My name is Karen Perez.

ASSISTANT: Perez, how may I help you?

USER: I want to cancel my current reservation because my friend met with an accident. Can you help me?

ASSISTANT: Sorry, no reservation found by your name.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for contacting us.