You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Ryan Walker here. My wedding has been postponed, so I want to reschedule my itinerary dates.

ASSISTANT: Ryan Walker, I will help you. Please allow me a minute.

USER: Sure.

ASSISTANT: Thank you. I am really sorry to inform you that there is no reservation done on your name.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us. Have a great time.