You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Can you please help me in booking my flight ticket from HOU to SFO?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please help me with your name.

USER: Myself Elizabeth Edwards.

ASSISTANT: Please help me with your planned travelling dates.

USER: My travelling dates are from 11/15 to 11/17.

ASSISTANT: Do you need a break in between your journey?

USER: I need a single break.

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

USER: Yes, my return time will be in the evening.

ASSISTANT: Please allow me a minute.

USER: Sure.

ASSISTANT: Elizabeth Edwards, I am really sorry to inform you that there are no flights available for your journey.

USER: It's ok, thank you.

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