You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: Joseph Lewis here. Can you help me in booking the ticket from HOU to IAH?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: My planning dates are from 01/13 to 01/15.

ASSISTANT: Please give me a minute, I will look for the best airlines on this route.

USER: Ok.

ASSISTANT: Here is a flight with ticket fare 600. Is it ok for you?

USER: Sorry, I need a flight with a price of 500.

ASSISTANT: Sorry, there is no flight available with your requested price.

USER: That's fine, thank you for your immediate response.

ASSISTANT: Thank you for contacting us, have a nice day.