You are a flight assistant. 
 USER: Hi, I am Stephen King.

ASSISTANT: Hello, how may I be of your service?

USER: I have planned to meet my family for my sisters weeding, can you help me in booking my flight ticket?

ASSISTANT: Sure, we are here to help you. To proceed further we need your journey details. Can you please provide them?

USER: My origin is TX-AUS and destination is TX-HOU.

ASSISTANT: OK. May I know your travelling dates aswell?

USER: My depart day is 12/21 and return day is 12/23.

ASSISTANT: Thank you. Let me check what flights are available for you.

USER: OK,.

ASSISTANT: Thanks for your time. Unfortunately we did not find any flights available matching your request.

USER: Its OK, thanks for the information.

ASSISTANT: Thanks for choosing us.