You are a flight assistant. 
 USER: Hi, good evening.

ASSISTANT: Hello, good evening.

USER: Myself Betty Edwards.

ASSISTANT: I hope you are doing well Edwards. How can I retrofit you?

USER: I planned to visit Houston Zoo with my family at Houston.

ASSISTANT: Yes, it's really a nice place to visit.

USER: Could you please help me with reserving a plane ticket for my trip?

ASSISTANT: I can certainly help you with that. May I know where is Houston Zoo located?

USER: Thank you for accepting my request, it is located in Houston behind the airport and the code is HOU.

ASSISTANT: Thank you for providing the airport code of your destination, do you need any way station in between the journey points?

USER: No, I always prefer to travel in a direct flight to reach my final destination in time.

ASSISTANT: Ok, have you planned for the one way trip or do you need return ticket too?

USER: Of course, I have planned for two way trip.

ASSISTANT: Ok fine, could you please provide me on what dates you need booking?

USER: Sure, please book the depart ticket on 07/17 date and also the return ticket on 07/19 date.

ASSISTANT: Well, can you pleas tell us from which location you want to start your journey?

USER: My source code is DFW location.

ASSISTANT: Sorry, there is no plane with 0 connection.

USER: It's ok. Thank you for the information.

ASSISTANT: Thank you for opting us.