You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

USER: My name is Emma Smith. Owing an emergency, I want to cancel my reservation. Can you help me for that?

ASSISTANT: Sure, I will help you. Please wait for a moment.

USER: Thank you, I will wait for your response.

ASSISTANT: Sorry, there is no reservation existing on your name.

USER: That's ok, thank you for checking.

ASSISTANT: You are welcome, have a nice day.