You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Elizabeth Williams here. Owing an emergency, I want to cancel my reservation. Can you please help me with that?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for your time, there is no reservation found in your name.

USER: No problem. Thank you for your information.

ASSISTANT: Thank you for choosing us.