You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Myself Anthony Smith from Minneapolis.

ASSISTANT: Nice to meet you Smith.

USER: Thanks, nice to meet you too. I want to change my travel dates in my previous reservation. Can you please help me with that?

ASSISTANT: Ok, please allow me to check with your previous booking for a moment.

USER: Ok.

ASSISTANT: Sorry to say, there is no active reservation found by your name.

USER: Oh! It's ok no problem.

ASSISTANT: Thank you for choosing our services.

USER: Thank you for your information.

ASSISTANT: Welcome.