You are a flight assistant. 
 USER: Hello. I am Anna Edwards.

ASSISTANT: Hello, how may I serve you today?

USER: I need to book a ticket with fare of 500 to Houston TX-HOU. Could you please help me in doing that?

ASSISTANT: Sure, can you please share your travelling dates?

USER: My travelling dates are 06/09 and return on 06/11.

ASSISTANT: May I know your source point?

USER: My source code is Dallas and Fort Worth TX-DFW.

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

USER: I need a halt in between the journey.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for your valuable time, sorry, no flights available on that route.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for approaching us.