You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I am Rebecca Perez. I booked a flight ticket  earlier to go for a death valley adventure at Orlando but the trip got postponed. Please change my existing reservation.

ASSISTANT: Sure, please wait a moment.

USER: Ok, take your time.

ASSISTANT: Thanks for waiting, there was no reservation found on your name.

USER: That's fine, thank you for the information.

ASSISTANT: Thank you for choosing us.