You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you change my recent reservation because my trip dates are postponed, can you help me?

ASSISTANT: Let me know your name.

USER: I am Carolyn Taylor.

ASSISTANT: Sorry, no reservation found by your name.

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

ASSISTANT: Thank you.