You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Amy Wright here.

ASSISTANT: How can I aid you?

USER: I want to attend a Marriage in Houston. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My travelling dates are 09/12 and 09/14.

ASSISTANT: Please provide me the airport codes.

USER: My airport codes are PHL and IAH.

ASSISTANT: Do you have any specifications?

USER: I would prefer single halt.

ASSISTANT: Sorry, there are no flights available for your desired dates.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching us.