You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Owning to an emergency I want to change my existing reservation. Can you please help me with this?

ASSISTANT: Sure, may I know your name for the changing process?

USER: I am Robert Baker.

ASSISTANT: Thank you, can you wait for some time?

USER: Sure.

ASSISTANT: Sorry, we couldn't find a reservation on your name to change.

USER: Ok, not an issue. Thank you for the information.

ASSISTANT: Welcome, thank you for reaching us.