You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Scott Taylor here.

ASSISTANT: How can I assist you today?

USER: Due to sudden change in my planned date of journey, I would like to change my reservation. Can you please help me out with that?

ASSISTANT: Sure, I am her to help you.

USER: Thank you.

ASSISTANT: Sorry, no reservation found on your name.

USER: Oh! I think the ticket was not booked due to server issue. Anyway, thank you for the information.

ASSISTANT: Welcome, thank you for reaching us.