You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Mark Lopez.

ASSISTANT: What kind of services are you looking from us?

USER: I want to cancel my recent reservation, due to ill health. Can you please help me?

ASSISTANT: Mark Lopez, I am willing to help you for this. Let me check your reservation status in our database.

USER: Sure, take your own time.

ASSISTANT: Sorry to inform that, no reservation is found with your criteria.

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

ASSISTANT: Thank you very much for utilising our agency.