You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you please help me to change my reservation as I have to postpone my trip?

ASSISTANT: Sure, I will help you with change of the flight ticket reservation.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: My name is Emma Edwards.

ASSISTANT: Wait for a moment please. I will have to check for your flight reservation.

USER: Sure.

ASSISTANT: Thanks for your patience. I have not found your flight reservation to change it.

USER: No problem, thank you for your time.

ASSISTANT: Thank you.