You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist 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, I'm always here to help you. Can you please provide your name?

USER: Karen Hill here.

ASSISTANT: Ok, please allow me a minute to check your reservation status.

USER: Ok.

ASSISTANT: Karen Hill, I have searched our database for your reservation details but there is no reservation found active under your name to do modifications in that.

USER: No issue. Thank you.

ASSISTANT: Thank you for choosing us.