You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Stephanie Carter. I would like to change my recent existing reservation because my friend who is participating in gun shooting has been postponed.

ASSISTANT: Ok, let me check with your previous reservation for a moment Stephanie Carter.

USER: Sure.

ASSISTANT: Thank you for your patience.

USER: Not an issue.

ASSISTANT: Sorry to inform you but there is no reservation found by your name.

USER: No issue, thank you.

ASSISTANT: Thank you for reaching our services. Have a nice day Stephanie Carter.