You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you?

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

ASSISTANT: Sure, may I know your name?

USER: Sure, my name is George Hernandez.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your own time.

ASSISTANT: Sorry, there is no reservation found on your name.

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

ASSISTANT: Thank you for availing us.