You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Can you help me to book a flight from OAK to HOU?

ASSISTANT: Sure, please provide me your itinerary travel dates.

USER: My travelling dates are June 18 and 20.

ASSISTANT: Would you like to travel by direct or connecting flight?

USER: I prefer connecting flight.

ASSISTANT: Are there any more preferences that you want to avail?

USER: No.

ASSISTANT: May I know your name please?

USER: My name is Kathleen Johnson.

ASSISTANT: Give me a moment.

USER: Ok.

ASSISTANT: I regret to inform that there are no connecting flights.

USER: No issues, thank you for your information.

ASSISTANT: Thank you for reaching us.