You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Is this a flight booking agency?

ASSISTANT: Yes, you are at right place. What help that you are looking from our agency?

USER: Ok, I think I can solve my problem in quick manner.  In the last month I have reserved a flight on my name to travel to San Francisco to celebrate my father birthday but suddenly there is an examination on the same date our college management has informed suddenly to us. So I will travel to my home on some other dates. Can you please help me in changing my flight ticket booking?

ASSISTANT: Sure, I am gleeful to help you in flight ticket modification.

USER: That's great from your side, thank you for considering my request.

ASSISTANT: May I know your name to check your previous reservation status for modification?

USER: Sure, my name is Mary Martin.

ASSISTANT: Please be on hold for checking your reservation status.

USER: Sure, take your own time. I will wait for your positive response.

ASSISTANT: Sorry, I am unable to find your previous reservation status when I have checked in our ticket booking list.

USER: Ok, I think the ticket is not booked properly and I did not get any confirmation from flight agency. So, that's why only it is not showing in your booking list.

ASSISTANT: Ok it might be happened due to some technical issues. Is there any help you are looking from my agency?

USER: No, If I need any help from you then I will reach you. Thank you for your valuable time.

ASSISTANT: Yes, you are always welcome.