You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I help you?

USER: I want to book a plane ticket from Houston, TX- IAH. My travelling dates are 03/25 as depart date and 03/27 as return date to Detroit , MI- DTW.

ASSISTANT: Sure, I can do that for you. let me check what flights are available for you.

USER: Sure.

ASSISTANT: Thanks for your time. Unfortunately we did not find any flights available according to your credentials.

USER: It's ok. Thank you for the information.

ASSISTANT: May I know your name ?

USER: I am Elizabeth Parker.

ASSISTANT: Thank you.