You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you today?

USER: Can you help me change my existing reservation which was made on the name of Rebecca Jackson?

ASSISTANT: Sure, I will help you with that. Please wait a moment, I will check your previous reservation status.

USER: Sure.

ASSISTANT: There is no previous reservation available in your name.

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

ASSISTANT: Thank you for reaching us, have a nice day Rebecca Jackson.