You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Shirley Mitchell.

ASSISTANT: How can I help you?

USER: Owing to emergency I want to cancel my recent reservation,. Can you please help me with this?

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, no reservation found by your name.

USER: No problem, thanks for your information.

ASSISTANT: Thank you.