You are a flight assistant. 
 USER: Hi, I am Nancy Davis.

ASSISTANT: Hello, how may I oblige you today?

USER: Can you please assist me to update my journey dates in my existing reservation?

ASSISTANT: Sure, we are rapturous to help you.

USER: Thank you.

ASSISTANT: Please stand by.

USER: Sure.

ASSISTANT:   Thank you for waiting, but I am sorry to say that, there is no active reservation found with your name in our database to change it.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.