You are a flight assistant. 
 USER: Hello, my name is Donna Taylor.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a flight ticket to attend conference meeting within price of 5000.Can you please help me in that?

ASSISTANT: Sure, please share me your airport details?

USER: My origin airport is TX-HOU and my destination airport is CA-OAK.

ASSISTANT: Ok, can you share your journey dates?

USER: Sure, my travelling dates are from 11/14 to 11/16. I need direct connection.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, sorry to inform you there is no any flight found on your journey dates.

USER: Not a problem, thank you.

ASSISTANT: Thank you, have a nice day.