You are a flight assistant. 
 USER: Hello. Jeffrey Clark here.

ASSISTANT: Hello, how may I help you?

USER: Accidentally, I have booked my flight ticket on 01/01. Can you change my reservation date?

ASSISTANT: Sure.

USER: Thanks.

ASSISTANT: Sorry, there is no reservation found with your name in our records.

USER: Oh! May be my flight ticket reservation is not properly done. Anyways, thank you for your time.

ASSISTANT: It's my pleasure.