You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I would like to change my existing reservation due to postpone of my new project seminar with company delegates at Washington. Could you please help me?

ASSISTANT: Sure, please provide me the name to check for the status.

USER: Sure, my name is Anthony Robinson.

ASSISTANT: Please be on be hold, I will get back to you in a minute.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for waiting. Here, there is no active reservation have been found under your name in our database to amend it.

USER: No worries, thank you for the information.

ASSISTANT: Thank you for reaching us.