You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: My business meeting has been postponed, so I would like to change my existing reservation.

ASSISTANT: Sure, will you provide the name for checking the reservation?

USER: Sure, my name is Deborah Thomas.

ASSISTANT: Please give me a moment.

USER: Ok, take your time.

ASSISTANT: Thank you for waiting. There is no reservation found under your name.

USER: Ok, no problem. Thank you for checking.

ASSISTANT: Welcome, have a great day.