You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: I have to change my travel airport codes because I have given a airport code which is far to my current location. So, I need your help. Will you please help me in changing the details?

ASSISTANT: Sure, I am here to help you. May I know on whose name the ticket has been reserved formerly?

USER: Myself Jennifer Mitchell.

ASSISTANT: Sorry Jennifer Mitchell, there are no flights reserved on your given name formerly.

USER: Thank you.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.