You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Can you please book a ticket from EWR to DFW to meet my sister?

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

USER: My travelling dates are June 29 and July 1.

ASSISTANT: Please let me know with your name.

USER: Sure, I am Richard Anderson.

ASSISTANT: Do you need a break in your journey?

USER: I would like to fly in single connected flight.

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

USER: My return time is afternoon.

ASSISTANT: Please let me know if you have any other preferences in your journey.

USER: I don't have any other preferences.

ASSISTANT: Richard Anderson, I am really sorry to inform you that there is no flight available for your journey.

USER: Ok, Thank you.

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