You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Benjamin Brown.

ASSISTANT: Brown, how may I assist you today?

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

ASSISTANT: Sure, I am happy to help you. I will check your reservation status and get back to you.

USER: Sure, take your time.

ASSISTANT: Brown, I have not found any reservation by your name in our database.

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

ASSISTANT: You are welcome, thank you very much for contacting us.

USER: You are welcome.