You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I'm Nicole Jackson. I have booked a ticket last week, but I need to attend a meeting on that date. So I'm planning to change my reservation. Can you please help me with that?

ASSISTANT: Sure, I am here to help you. Please give me a moment to check your details.

USER: Ok, take your own time.

ASSISTANT: Sorry, there is no reservation found on your name. Do you like to know anything else?

USER: That's ok, may be my friend has changed that already. Thank you for your information anyways. No, thank you for your concern.

ASSISTANT: Ok, you are welcome.