You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Sure, I will help you. May I know your name please to check your reservation status?

USER: My name is Joshua Walker.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Joshua Walker, no reservation has been found on your name in our database.

USER: Not an issue, thank you for the information.

ASSISTANT: Thank you for reaching us.