You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

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

ASSISTANT: May I know your name please?

USER: Thank you for your response, my name is Nicholas Clark.

ASSISTANT: Please wait for a while.

USER: Ok.

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

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

ASSISTANT: Thanks for reaching us.