You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you?

USER: I am Nicole Parker. I want to change my flight reservation due to some health issue, can you please help me?

ASSISTANT: Sure Nicole Parker, I am here to help you for this. Let me check your reservation status in our database.

USER: Sure.

ASSISTANT: Sorry for inconvenience, no reservation is found with your criteria.

USER: No problem, thank you for checking.

ASSISTANT: Thank you very much for contacting our agency.