You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today from my end?

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

ASSISTANT: Sure, I am mirthful to help you out. Please provide me your name to check the previous reservation on your name.

USER: Sure, I have done my previous reservation with the name Raymond Taylor.

ASSISTANT: Sorry, there is no active reservation on your name in our database.

USER: Oh! May be something went wrong while I was booking my ticket. Thank you anyways.

ASSISTANT: Thank you for reaching us.