You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I be at your service today?

USER: I am Jennifer Clark. I want to cancel my recent reservation due to some health issues, can you please help me with that?

ASSISTANT: Sure, we are here to help you. Please wait a moment, I will check your details and get back to you.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no reservation found on the name Jennifer Clark.

USER: No problem. Thank you.

ASSISTANT: Thank you for contacting us.