You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you at this moment?

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

ASSISTANT: Sure, I am here to help you with this. Can you please provide your name to check your reservation status?

USER: Myself Jessica Miller.

ASSISTANT: Wait a moment please.

USER: Sure, I will wait for your response.

ASSISTANT: Jessica Miller, there is no active reservation found under your name in our database.

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

ASSISTANT: Thank you for contacting us.