You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Myself Justin Baker. As the cricket match got postponed, I would like to change my dates of reservation.

ASSISTANT: Ok, wait for a while.

USER: Ok.

ASSISTANT: There is no previous reservation booked as per your information.

USER: Ok, thank you for your time.

ASSISTANT: Thank you for choosing us.