You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I want to cancel my recent reservation owing to an emergency.

ASSISTANT: Please share your name to proceed further.

USER: My name is Debra Lopez.

ASSISTANT:  I am very sorry to inform you that there is no reservation found under your name in our database.

USER: Thanks.

ASSISTANT: Thank you for choosing us.