You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you at this moment?

USER: I need to travel from HOU to IAH, can you help me?

ASSISTANT: Sure, I am here to help you. Can you please provide your journey dates?

USER: My trip dates are Aug 02 to 04.

ASSISTANT: Do you have any connection limit preference?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications for this trip?

USER: I prefer economy class.

ASSISTANT: May I know your name to proceed further?

USER: Edward Lee here.

ASSISTANT: Edward Lee, there are no flight services available on this route on your provided dates.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for contacting us.