You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I want to change dates in my recent reservation, can you please help me?

ASSISTANT: Sure, I am gleeful to help you with that.

USER: Thank you for your positive response.

ASSISTANT: May I know your name for checking your previous reservation status?

USER: Sure, please check with the name Daniel King.

ASSISTANT: Please wait for a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for waiting. There is no active reservation found on your name in our database to change.

USER: No issue, anyway thank you for checking.

ASSISTANT: Thank you for contacting us, have a great day.