You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you at this moment?

USER: I want to cancel my recent reservation due to some health issue. Can you help me?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Can I know your name to check your previous reservation?

USER: Yes, I am Jessica Johnson here.

ASSISTANT: Please wait a moment to check.

USER: Sure.

ASSISTANT: We regret to inform you that there is no reservation found with your name that you have provided in our database.

USER: That's ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us, hope you have a great day.