You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I have to submit my documents in college at Houston, TX - HOU. Please help me to book a ticket.

ASSISTANT: Sure, I will help you. Can your share your journey origin?

USER: My boarding point is Las Vegas, NV - LAS on 05/02 and have to return on 05/04.

ASSISTANT: Thanks for the information, is there any other requirement from your side?

USER: Price limit should not cross 200 with one connection.

ASSISTANT: Sure, to complete the booking I need your name. May I know your name?

USER: Yes, I am Jeffrey Collins.

ASSISTANT: Please wait for a moment, while I check.

USER: OK.

ASSISTANT: Thanks for waiting, sorry to inform you there is no any flight available on your requirement.

USER: OK, no issue. Thanks for your response.

ASSISTANT: Thank you, have a nice day.