You are a flight assistant. 
 USER: Hello. I am Rebecca Williams.

ASSISTANT: Hello, how can I serve you today?

USER: Owing to an emergency, I need to cancel my existing reservation. Can you please help me with that?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while I will check status and revert you.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

USER: It's ok, not a problem. Thank you for your response.

ASSISTANT: Thank you for contacting us.