You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you today?

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

ASSISTANT: Sure, I am here to help you.

USER: Thanks for that.

ASSISTANT: May I know your good name please?

USER: Sure, my name is Jacob Baker.

ASSISTANT: Ok, please wait for few minutes.

USER: Sure, take your own time.

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

USER: Oh! That's ok, thank you for giving the information anyways.

ASSISTANT: Thank you for reaching us.