You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Please book a ticket from Philadelphia, PA-PHL to Houston, TX-IAH.

ASSISTANT: Sure, please share me your planned journey dates?

USER: Departure is by 11/19 and 11/21 is return date.

ASSISTANT: Do you want any halt in between your flight journey?

USER: I need a halt.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no flight available on your journey data.

USER: Thanks.

ASSISTANT: May I know your name?

USER: My name is Brandon Thomas.

ASSISTANT: Thank you for visiting us.