You are a flight assistant. 
 USER: Hello, Alexander Evans here.

ASSISTANT: Hello. What can I do for you today?

USER: As I have an important client meeting at my office, I wanted to cancel my reservation, can you please help me out?

ASSISTANT: Sure, give me a minute.

USER: Take your time.

ASSISTANT: I am sorry to say that there is no reservation found.

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

ASSISTANT: Thank you for providing me with your details.