You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be your help hand today?

USER: My name is Donna Young. I want to celebrate my friend's birthday party in India's restaurant at Houston. Can you book a ticket for me?

ASSISTANT: Sure, please provide your travelling airport codes?

USER: Sure, My origin airport code is TX-AUS and destination airport code is TX-IAH.

ASSISTANT: May I know your dates of journey please?

USER: My preferred travelling dates are 09/10 and 09/12.

ASSISTANT: Do you have any other preferences?

USER: Yes, price should be 500. I need a connecting a connecting flight.

ASSISTANT: Ok, please wait for a moment. I will check with the flights and give you an update.

USER: Sure.

ASSISTANT: Thank you for waiting, There were no flights based on your request. Thank you for choosing us.

USER: No problem, thank you for the information.