You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello.

USER: I am Daniel Robinson.

ASSISTANT: How can I amend you?

USER: I made a reservation earlier in the wrong date unknowingly, can you please help me in changing my existing reservation?

ASSISTANT: Sure. Please, wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

USER: Thanks for the help.

ASSISTANT: Thank you for reaching us.