You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I want to change my travelling airport. Can you please help me in changing my recent reservation?

ASSISTANT: Sure, can I know your name please?

USER: I have reserved my flight ticket with name Samuel Harris.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, fine thank you for your information.

ASSISTANT: Thank you for approaching us.