You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: As I have reserved my flight ticket earlier to attend my friend marriage but the marriage date has been preponed, can you help me in changing my reservation?

ASSISTANT: Sure, may I know your name to check the reservation list and revert you?

USER: Benjamin turner here.

ASSISTANT: There is no reservation found by this name.

USER: No problem, thank you for your assistance.

ASSISTANT: Thank you for approaching us.