You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Patricia Johnson.

ASSISTANT: How can I serve you?

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. There is no reservation found on your name.

USER: No issue. Thank you.

ASSISTANT: Thank you.