You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm David Taylor.

ASSISTANT: Taylor, how can I help you today?

USER: My holiday trip has been postponed. So, I would like to change my reservation which is under my name. Can you please help me with that?

ASSISTANT: I am happy to help you, let me check your reservation status in our database.

USER: Sure, take your time.

ASSISTANT: Taylor, I have not found any reservation by your name.

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

ASSISTANT: Thank you for contacting us.

USER: You are welcome.