You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help 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: May I know your name?

USER: Please check under the name Daniel Green.

ASSISTANT: Sorry, we did not found any reservations under your name.

USER: Not a big deal, anyhow thank you very much for your service.

ASSISTANT: Thank you for reaching us.