You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may 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 will help you with that.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Ronald Hernandez here.

ASSISTANT: I am sorry to say that there is no reservation found under your name.

USER: No issue, Thank you.

ASSISTANT: Thank you for reaching us.