You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: Can you please help me in changing my recent reservation? As my planned trip has been postponed to some other dates.

ASSISTANT: Sure, I will aid you with that. May I know your name for checking your previous reservation status?

USER: Yes, my name is Cynthia Hall.

ASSISTANT: Ok, please hold on a moment.

USER: Sure, I'll be online.

ASSISTANT: There is no previous reservation available under your name.

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

ASSISTANT: Thank you for reaching us.