You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Due to some urgent entrepreneurship meeting, I am willing to change my existing reservation. Can you please help me for this?

ASSISTANT:        Sure, I am here to help you. May I know your name please?

USER: I made a reservation by this name Mary Turner.

ASSISTANT: Ok, please stand by I will get back to you.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry no reservation found on your name.

USER: That's ok. Thank you for your information.

ASSISTANT: Thank you for reaching us, have a nice day.