You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Ruth Roberts.

ASSISTANT: How may I help you today?

USER: I need to change my reservation due to my planned event got postponed. So please help me with changing my reservation.

ASSISTANT: Sure, I am here to help you with that.

USER: Thank you for that.

ASSISTANT: Please wait for a minute.

USER: Sure, take your time.

ASSISTANT: Sorry to say that, there is no reservation found on your name in our database.

USER: Oh! It may not be booked properly due to server issues. Anyway, thank you for your time.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.