You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you out?

USER: Will you please assist me to change my existing reservation as my plan to meet my friend got postponed?

ASSISTANT: Sure, I will help you in changing the ticket. May I know your  name please?

USER: Thank you. Jerry Jones here.

ASSISTANT: Sorry, there are no reservations found.

USER: No issue.

ASSISTANT: Thank you for reaching us.

USER: Thank you for the information.