You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I just want to change my existing reservation, due to my trip with my friends has been postponed. Can you please help me to make some modifications?

ASSISTANT: Sure, may I know your name?

USER: Thanks for accepting my request, Nicole Wright is my name.

ASSISTANT: Please wait for a moment to check your details.

USER: Sure.

ASSISTANT: Thank you for waiting, no reservation found on your name in my records.

USER: Ok, thanks for your assistance.

ASSISTANT: Thank you for reaching us.