You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I need to change my recent reservation, can you please help me?

ASSISTANT: Sure, I can help you with that. Please provide me your name to check your reservation status.

USER: Myself Elizabeth Clark.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Elizabeth Clark, there is no active reservation found under your name to do modifications in that.

USER: That's ok, thank you for searching the details.

ASSISTANT: Thank you for choosing us.