You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, could you please tell us for what help you approached us?

USER: I want to fly from PHL and IAH. Can you book a ticket from that route?

ASSISTANT: Sure, may I know your departure and arrival day?

USER: My planned travel dates are 08/31 and 09/02.

ASSISTANT: Ok, could I have your name please?

USER: Sure, Donna Nelson here.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I want a connecting flight with in the economy class only.

ASSISTANT: Ok, do you have any other specifications?

USER: No more, thank you.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: No issues, thank you for the information.

ASSISTANT: You are welcome, have a great day.