You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you now?

USER: Due to some issue in the group the trip which we have planned got postponed to other dates, can you please modify my recent ticket booking?

ASSISTANT: Sure, may I know your name please?

USER: Yes, my name is Stephen King.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: That's fine, no issues with that one. Thank you for your help.

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

USER: Most welcome.