You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am Timothy Taylor. I want to change my reservation date, Can you help me to change my reservation with new dates?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no reservation found on the given name in our reservation data base.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.