You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Myself George Scott. I would like to shift my planned dates to some other dates, please help me in changing my existing reservation.

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait a minute.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting, sorry we didn't find any reservation on your name.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for opting us, have a good day.