You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you today?

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

ASSISTANT: Can I know your name please?

USER: My name is Melissa Miller.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: We did not find any reservation on your given name in our data base.

USER: Thanks.

ASSISTANT: Thank you for choosing us.