You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Can you please assist me with changing my specifications with my previous booking now?

ASSISTANT: Sure, may I know your name to check for the previous reservation?

USER: My booking was done by the name of Matthew White.

ASSISTANT: Please allow me a moment while I check your reservation status.

USER: Ok, take your time.

ASSISTANT: Matthew White, there is no reservation found under your name.

USER: Oh! That's completely fine. Thank you for checking.

ASSISTANT: Thank you for contacting us.

USER: Most welcome.