You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Gregory Scott.

ASSISTANT: How may I assist you today?

USER: I had planned to go on a trip, but it was postponed due to some reasons. Can you change my recent reservation?

ASSISTANT: I am here to help you, please hold on a moment I will check your reservation.

USER: Ok, take your own time.

ASSISTANT: Thanks for your patience, there is active reservation found on your name in our database.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Welcome.