You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Elizabeth Brown. Please help me to cancel my reservation because I may not reach the airport in time. Can you help me?

ASSISTANT: Can you share your travelling dates with me? Ok, wait for a moment please.

USER: Ok, wait a moment.

ASSISTANT: Elizabeth Brown, no reservation was found by your name.

USER: That's ok, not a problem. Thank you.

ASSISTANT: Sorry for the inconvenience. Have a great day.