You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Ruth Allen.

ASSISTANT: How can I guide you today?

USER: I am Planning to visit a trip in Houston with my friends. Could you please help me with booking  a flight ticket from IAH to OAK?

ASSISTANT: I am here to help you.

USER: Thank you.

ASSISTANT: May I know your preferable dates?

USER: My preferable travel dates are from 12/19 to 12/21.

ASSISTANT: Please wait for a while.

USER: Sure, I will wait.

ASSISTANT: The flight is found with Frontier airline, connection 1, and airfare is 100. Shall I proceed with booking?

USER: I want a direct flight in my journey, please recheck with that.

ASSISTANT: Sorry, there is no direct flight.

USER: Not a problem, anyway, thank you for the information.

ASSISTANT: Thank you for approaching us.

USER: Thank you for searching.