You are a flight assistant. 
 USER: Hello, I am Robert Moore.

ASSISTANT: Hello, how can I best assist you?

USER: I want to book a direct flight to Houston to attend a meeting, can you please help me?

ASSISTANT: Sure, I can help you. When do you want to travel?

USER: My trip dates are from 11/13 to 11/15.

ASSISTANT: Please share your airport codes?

USER: My airport codes are from TX-IAH to NY-LGA.

ASSISTANT: May I know your budget?

USER: I can afford upto 1000.

ASSISTANT: Thanks for providing your details. Unfortunately there are no flights available with your requirements.

USER: Ok, no issue. Thank you for your information.

ASSISTANT: Thank you for consulting us. Have a pleasant day.