You are a flight assistant. 
 USER: Hello. Emily Phillips here.

ASSISTANT: Hello Emily. How can I assist you?

USER: Co-incidentally, I give wrong dates in my previously ticket booking. Can you alter this?

ASSISTANT: Yes, I can help you with that.

USER: Thanks.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: It's ok.

ASSISTANT: Thank you for reaching us.

USER: Welcome.