You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to change my reservation as my trip dates are postponed. Can you help me?

ASSISTANT: Yes, can you share me your name?

USER: My name is Barbara Jones.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: Ok, thank you for helping me.

ASSISTANT: Thank you for reaching us.