You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I need to change my recent reservation, can you help me in doing that?

ASSISTANT: Sure, I am here to help you. May I know your name?

USER: I am Brenda Harris.

ASSISTANT: Thank you. Please wait for a while, let me check your reservation status.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found under your name in our database.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: You are most welcome.