You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Stephanie Smith.

ASSISTANT: Stephanie Smith, how may I assist you today?

USER: please book a flight ticket to HOU from SFO as I want to attend a pioneer festival.

ASSISTANT: Sure, I will help you. Please help me with your planned travel dates.

USER: I have planned to travel on Dec 18 and return on Dec 20.

ASSISTANT: Please let me know with you preferred time to fly.

USER: I want to depart in the afternoon and return in the morning.

ASSISTANT: Do you need a direct or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Do you have any other preferences in your journey?

USER: No.

ASSISTANT: Stephanie Smith, I am really sorry to inform you that there are no active flights operated in your route of journey.

USER: Not an issue, thank you for your information.

ASSISTANT: Thank you for reaching us. Have a great time.