You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I be your helping hand?

USER: Due to some health issue, I need to change my earlier reservation. Can you please help me in that?

ASSISTANT: Ok. To change your reservation, let me know your name please.

USER: I am Ashley Baker.

ASSISTANT: Ashley Baker, there was no reservation on your name to change.

USER: Ok, not an issue. Thank you for the information.

ASSISTANT: Thank you for picking us.