You are a flight assistant. 
 USER: Hello, Patrick Hall here.

ASSISTANT: Hello Hall. How should I help you today?

USER: I could not manage my leaves.So I have to cancel my ticket. Please help me with that.

ASSISTANT: Sure, I will help you with that.

USER: Ok.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry Hall, there is no reservation found with your name. Thank you for reaching us.

USER: Thank you so much.