You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: Can you please change my travel dates in my reservation?

ASSISTANT: Sure, I will help you with that. Can you please provide your name to check your previous reservation?

USER: Thank you, my name is Anna Phillips.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: We regret to inform you that, there is no reservation found on your name in our records.

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

ASSISTANT: Thank you for reaching us.