You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I support you?

USER: I would like to book a flight ticket from Houston to attend a business meeting in Chicago, can you please help me in booking?

ASSISTANT: Sure, we are here to help you. May I know your itinerary dates?

USER: Sure, I intend to start my journey on 01/16 and my return date will be on 01/18.

ASSISTANT: Do you need any way station in your journey?

USER: I need a break in between my journey.

ASSISTANT: May I know your depart and arrival time?

USER: I don't have any particular timings.

ASSISTANT: Do you have any other requirements?

USER: No more specifications for this trip.

ASSISTANT: Can you help me with your airport codes?

USER: My source airport code is IAH and my destination airport code is ORD.

ASSISTANT: May I know your good name please?

USER: I am Anna Robinson.

ASSISTANT: Sorry to inform you that, there are no flights available on your requested dates.

USER: That's ok, I'll choose any alternative to reach my destination. Thank you.

ASSISTANT: Thank you for choosing us.