You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide 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 help you with that.

USER: Thank you for accepting my request.

ASSISTANT: May I know your name please?

USER: I have reserved it on the name of Ruth Hall.

ASSISTANT: I am sorry to say that there is no reservation found under your name.

USER: Oh! I think the ticket was not booked properly while I am booking. Anyway, thank you for checking.

ASSISTANT: Thank you for  reaching us.

USER: Welcome.