You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Please help me in changing my recent reservation.

ASSISTANT: Sure, I am glad to help you out.

USER: Thank you.

ASSISTANT: Can you please share your name to check your reservation status?

USER: Nancy Turner.

ASSISTANT: Ok, please give me a moment.

USER: Sure.

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

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.