You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I serve you today?

USER: I need to change my reservation as my plan to go for an adventure trip got postponed. Can you please help me?

ASSISTANT: Sure, we are here to help you. Can I have your name please to check the reservation status?

USER: I am Rebecca Walker.

ASSISTANT: Ok, please wait a minute I will get back to you with the present status.

USER: Sure.

ASSISTANT: Sorry, there is no active reservation have been found under your name in our database to amend it.

USER: Ok fine, thanks for your assistance.

ASSISTANT: Thank you for approaching us.