You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What type of help that your are expecting from us?

USER: I have done my booking last month but I have done it with wrong dates. Can you please help me to change my reservation?

ASSISTANT: Yes, I will definitely help in that one.

USER: Thank you.

ASSISTANT: Please wait for a while to check it.

USER: Ok, sure.

ASSISTANT: May I know your name for checking purpose?

USER: Yes, I am Virginia Williams.

ASSISTANT: Ok, thank you for your information.

USER: Ok.

ASSISTANT: Sorry, I could not found any previous booking done on your name to change it.

USER: Ok, fine. Thank you for the information.

ASSISTANT: Thank you for your time in reaching us, have a nice day.