You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you?

USER: Can you please assist me to change the travel dates in the past ticket?

ASSISTANT: Sure, May I know your name?

USER: Thank you for considering my request. My name is Stephanie Carter.

ASSISTANT: Please wait a moment.

USER: Sure, I can wait for your reply.

ASSISTANT: Sorry, No reservation found on your name.

USER: It's ok, not a problem with that. Anyhow thanks a lot for spending your time.

ASSISTANT: Thank you for opting us.