You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Yes, can I know your name?

USER: Sure, myself Andrew Davis.

ASSISTANT: Hold on for a moment Andrew. I'm sorry Andrew, there are no reservations with your name.

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

ASSISTANT: Thank you, have a good day.