You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support 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, please share me your good name.

USER: Sure, my name is Kathleen Smith.

ASSISTANT: Please wait for a while.

USER: Sure, I'll wait for your response.

ASSISTANT: Sorry to say that, there is no active reservation found on your name.

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

ASSISTANT: Thank you for opting us.