You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Can you help me in changing my recent reservation?

ASSISTANT: I am here to help you with your concern. Sure, can you please let me know your name to check with the reservation status?

USER: I am Karen Smith.

ASSISTANT: Thank you for sharing your name. Please allow me 2-3 minutes while I check for the status in our database.

USER: Sure.

ASSISTANT: Thank you for waiting, Karen Smith. Sorry, there is no active reservation found under your name to change.

USER: Its ok, thank you.

ASSISTANT: Thank you for reaching us. Have a great day!.