You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I provide assistance to you?

USER: As my exam got postpone, I need your help in changing my recent reservation details. Can you help me with that?

ASSISTANT: Sure, we are here to help you to change it. May I know your name please?

USER: Sure, my name is Susan Jones.

ASSISTANT: Ok, please wait for a couple of minutes.

USER: Sure, I'll be online.

ASSISTANT: Thanks for your time, there was no reservation found on your name to change it.

USER: Oh! May be I did a wrong booking. Thank you anyways.

ASSISTANT: Thank you for reaching our service.