You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Susan Lewis here.

ASSISTANT: How can I aid you?

USER: Reserve a flight ticket that is from IAH to AUS.

ASSISTANT: Ok, may I know your travelling dates?

USER: My preferable dates for travelling are 09/30 to 09/02.

ASSISTANT: Give me a minute.

USER: Ok.

ASSISTANT: There is a flight with number 1008 in airline UA. Can I book it?

USER: I need a direct flight.

ASSISTANT: Sorry, there is no direct flight.

USER: Ok, that's fine.

ASSISTANT: Thank you for reaching us.

USER: Thank you.