You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you now?

USER: As my tournament got postponed, can you help me to change my existing reservation?

ASSISTANT: Sure,  I will help you with that. May I know your name for checking the previous reservation status?

USER: Sure, my name is Robert Harris.

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

USER: That's ok, thank you.

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