You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Richard Garcia. I want to change my travel dates in my previous reservation, can you please help me with that?

ASSISTANT: Ok, please wait.

USER: Ok, thank you.

ASSISTANT: Sorry, no reservation found on your name to change.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.