You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you out?

USER: One of my friend got engaged on the same date which I have planned to reach my home town but I am unable to travel now, can you please help me in modifying my flight ticket?

ASSISTANT: Sure, I will help you in changing your reservation.

USER: Thank you for accepting my request.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: May I know your name please?

USER: I am Andrew Clark.

ASSISTANT: Sorry, there are no reservations found in our database.

USER: Oh! Ok, no issues with that, it might not confirmed till now, I can check it later. Thank you for your help.

ASSISTANT: Thank you for approaching us.