You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I need to book a flight ticket from SEA to IAH, Can you please help me for booking?

ASSISTANT: Sure, can you please share your travel dates?

USER: I would like to travel on 08/09 to return on 08/11.

ASSISTANT: May I know your connection limit?

USER: I need a direct flight.

ASSISTANT: Do you have any other specification that you are looking for?

USER: No.

ASSISTANT: May I know your name to proceed further?

USER: John Miller here.

ASSISTANT: I am sorry to inform you that there is no flight available at your request.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for contacting us.