You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve 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, we are here to help you. May I know on which name the ticket has been reserved?

USER: Sure, my name is Ronald Jones.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your own time.

ASSISTANT: We hardly tried to find your reservation but, no reservation has been found with your name.

USER: That's ok, thank you anyways.

ASSISTANT: Thank you for reaching us.