You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you for the day?

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

ASSISTANT: May I know your good name to check the status.

USER: Sure, my name is Samuel Carter.

ASSISTANT: Ok, please allow me to check the reservation list by your name and check the ticket status.

USER: Sure, take your own time.

ASSISTANT: I am very sorry to inform you, there is no active reservation found by your name in the reservation list.

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

ASSISTANT: Thank you for contacting our services.