You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you now?

USER: I want to book a connected flight to Houston, TX - HOU to overview the city. Can you please help me for booking?

ASSISTANT: Sure, I will help you with booking. Please share me your source airport code?

USER: My source is Phoenix, AZ - PHX.

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

USER: Yes, I need a halt.

ASSISTANT: Please mention your planned journey dates?

USER: I will depart on 10/16 and return on 10/18.

ASSISTANT: May I know your budget for flight ticket?

USER: I can spend up to 500.

ASSISTANT: Please wait for a moment.

USER: Sure.

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

USER: Ok, no issues.

ASSISTANT: May I know your good name?

USER: Sure, I am Mark Brown.

ASSISTANT: Thank you for visiting us.

USER: Thank you.