You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to change my travel dates in my reservation, can you help me?

ASSISTANT: Sure, I will help you. Please mention your name for further proceeding.

USER: Myself Richard Thompson.

ASSISTANT: Richard, no reservation has been found on your name.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for approaching us.