You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: I made a reservation earlier in the wrong date unknowingly so, I want to change my existing reservation. Can you please help me?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Can I have your name to proceed?

USER: Charles White here.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Thank you for your time, sorry no reservation found on your name.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.