You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I need to cancel my recent reservation due to an emergency, can you please help me?

ASSISTANT: Yes, can you share me your name?

USER: Sure, my name is Lisa Lee here.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: That's ok, not an issue.Thank you for your service.

ASSISTANT: Thank you for contacting us.