You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I address you?

USER: Can you please change my existing reservation?

ASSISTANT: Sure, please provide your name to fetch your data from our database.

USER: Sure, My name is Betty Baker.

ASSISTANT: Please give me few seconds to render your data.

USER: Sure.

ASSISTANT: We regret to inform you that there is no active reservation found on your name.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you for choosing us.