You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I want to change my reservation, can you help me in changing?

ASSISTANT: Sure, I am here to help you out. Please provide me your name to check the reservation status.

USER: I am Dorothy Robinson.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no active reservation on you given name.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.