You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

USER: I need to change my trip dates in the past ticket booking which I have done in the last week, so can you please help me in flight ticket modification?

ASSISTANT: Sure, I am here to help you.

USER: Thank you for your positive response.

ASSISTANT: May I know your good name please?

USER: Sure, my name is Stephanie Martinez.

ASSISTANT: OK, please wait for a minute.

USER: Sure.

ASSISTANT: Thanks for waiting.

USER: It's alright.

ASSISTANT: We are glad to say you there is no reservation found with your name.

USER: Not an issues with that one, I think it is not booked properly while I have booked the flight ticket. Thank you for your information.

ASSISTANT: Thank you for reaching us, have a good day.