You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Christopher Jones, I want to change my reservation as my plan to visit my brother home is postponed. Can you change my reservation with new dates?

ASSISTANT: Sure, I will help you. Please, wait a while.

USER: Sure.

ASSISTANT: Thank you for waiting. There is no reservation found on your name.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.