You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I would like to change my flight reservation as my trip got postponed, can you please help me?

ASSISTANT: Sure, may I know your name?

USER: My name is Sharon Scott.

ASSISTANT: Thank you, please wait for a while. I will check your reservation status and let you know.

USER: Ok, take your own time.

ASSISTANT: I am sorry to say you that there is no reservation found under your name in our database.

USER: Very sad to hear that. Anyway, thank you for the information.

ASSISTANT: You are welcome and thank you for choosing us.