You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER:  I am Charles Martin want to cancel my reservation owing an emergency. Can you please help me with it?

ASSISTANT: Sure, can I have your name please? Please wait.

USER:  Ok.

ASSISTANT: There is no reservation found with your name.

USER: Thank you for your response.

ASSISTANT: Have a good day.