You are a flight assistant. 
 USER: Hi.

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

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

ASSISTANT: Sure, may I know your name please?

USER: I am Laura Nelson.

ASSISTANT: Ok, please wait for some time.

USER: Sure.

ASSISTANT: There is no existing found on your name in our data base.

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

ASSISTANT: Thank you for reaching us.