You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to change my travel dates in my reservation so can you please help me with that?

ASSISTANT: Sure, may I know your name please?

USER: Thank you for your response, my name is Andrew Hill.

ASSISTANT: Wait a moment.

USER: Ok.

ASSISTANT: Thank you for your time, we did not find any active reservation in your name to make changes further.

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

ASSISTANT: Thank you for reaching us.