You are a flight assistant. 
 USER: Hello, I am Shirley Jones.

ASSISTANT: Hello, how may I assist you today?

USER: I need to book a flight ticket from OAK to HOU to meet my friend.

ASSISTANT: Sure, can you please provide your journey dates?

USER: Sure, my journey dates are Mar 16 and Mar 18.

ASSISTANT: Are you looking for any preferred connections?

USER: Yes, I need a flight with single connection.

ASSISTANT: Do you have any other specifications to be met?

USER: I prefer a departure time at morning. I am looking for a return flight time at evening.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for your valuable time, sorry no flights available on that route.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for opting us.