You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I want to change my ticket because the travelling dates are wrongly printed in the past ticket. Can you please help me?

ASSISTANT: Sure, I will help you with this.

USER: Thank you.

ASSISTANT: Can you please provide your name to check the reservation status?

USER: My name is Sharon Scott.

ASSISTANT: Sharon Scott, there is no active reservation found under your name in our database.

USER: It's ok, thank you for searching.

ASSISTANT: Thank you for contacting us.