You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: My holiday vacation has been postponed, can you please help me for changing the existing reservation?

ASSISTANT: Sure, can you help me with your name to check your details?

USER: Sure, my name is Sarah Turner.

ASSISTANT: Sorry, no reservation found on your name.

USER: No problem, I will search another way to complete my trip.

ASSISTANT: Thank you for choosing us, have a nice day.

USER: Thank you for your information.