You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

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

ASSISTANT: Sure, may I know your good name please?

USER: I am Thomas Moore.

ASSISTANT: Ok, wait for few minutes.

USER: Sure.

ASSISTANT: There is no existing reservation found on your name in our records.

USER: That's ok. Thank you for your service.

ASSISTANT: Thank you for reaching us.