You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Raymond Moore here. Due to heavy rains cricket match got postponed, so I need to change my existing reservation.

ASSISTANT: Just a moment please.

USER: I will wait, take your time.

ASSISTANT: I am sorry no reservation found on your name.

USER: That's ok, no issues.

ASSISTANT: Thank you for choosing us.

USER: Thank you.