You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Kimberly Wright here.

ASSISTANT: How can I aid 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, let me check your reservation status in our database.

USER: Sure, take your own time.

ASSISTANT: Sorry, we could't found any reservation in our database.

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

ASSISTANT: Thank you for choosing us.