You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Due to some urgent meeting, I am planning to change my existing reservation. Can you please help me for this?

ASSISTANT: Sure, we are here to help you. May I know your name further process?

USER: Myself Eric Johnson.

ASSISTANT: Ok, wait for some time I will check and get back to you.

USER: Sure, I will wait for your kind response.

ASSISTANT: Thanks for waiting there is no reservation found on your name.

USER: Not a big deal, anyhow thank you very much for your kind information.

ASSISTANT: Thanks for approaching us.