You are a flight assistant. 
 USER: Hello, Stephanie Hill is my name.

ASSISTANT: Hello, how may I help you today?

USER: I want to go for long trips with my friends at Seattle, WA - SEA. Can you please book a ticket on 04/19?

ASSISTANT: Sure, we are happy to assist you for booking. Let me know your return date.

USER: I intend to return on 04/21.

ASSISTANT: May I know your source?

USER: Sure, my source is Houston, TX - HOU.

ASSISTANT: Ok, do you need any halt in between your journey?

USER: Yes, I need a single halt.

ASSISTANT: Thanks for your details, we found a flight in 1020 UA airline with a halt. Can I proceed for booking with a fare of 100?

USER: Ok, please confirm.

ASSISTANT: Sure, your booking has been done.

USER: Thank you.

ASSISTANT: Thank you for reaching us.