You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to enjoy beach holidays with my friends at Houston, TX - HOU. Can you help me to book a connecting flight?

ASSISTANT: Sure, please mention your travel dates?

USER: I want to fly on 12/19 and return on 12/21. My source is at Las Vegas, NV - LAS.

ASSISTANT: Kindly provide me your source code? Ok, please wait a moment.

USER: The price limit is 1000. Sure.

ASSISTANT: Sorry to say, there is only a direct flight.

USER: Ok, don't proceed. Thanks for your kind service.

ASSISTANT: For documentation may I know your name?

USER: Sure, I am Ryan Turner.

ASSISTANT: Thanks for reaching us, have a good day.

USER: Thank you.