You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I need to change my current reservation due to urgent meeting, can you help me with that?

ASSISTANT: Sure, I can help you with that. May I know your good name please?

USER: Check under the name Anna Johnson.

ASSISTANT: Sure, I'll wait for your response.

USER: Ok.

ASSISTANT: Anna Johnson, there is no active reservation found under your name to do modifications in that.

USER: Not a big issue, anyhow thank you very much for checking the reservation status.

ASSISTANT: Thank you for choosing us.