You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jerry Wilson here.

ASSISTANT: Jerry Wilson, how may I lend a hand to?

USER: Due to sudden change in my planned date of journey, I would like to change my reservation to some other dates. Can you please help me out with that?

ASSISTANT: Jerry Wilson, I am willing to help you for this. Let me check your reservation status in our database.

USER: Thank you for accepting my request, take your time to check.

ASSISTANT: Jerry Wilson sorry to intimate, no reservation is found with your criteria.

USER: Oh! I think the ticket was not booked due to server issue at the time of my booking. Anyway, thank you for the information.

ASSISTANT: Thank you Jerry Wilson for utilizing our agency.

USER: Welcome.