You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

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

ASSISTANT: Sure, we are here to help you.

USER: Thank you for your response.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry to inform you that we did not find any reservation with your name.

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

ASSISTANT: Thank you for reaching us.