You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I have a event in AUS, so I want to travel from IAH.Can you help in booking the ticket?

ASSISTANT: Yes, please let me know your travelling dates?

USER: My preferable dates of travelling is from 04/30 till 05/02.

ASSISTANT: Hold on for a minute.

USER: Ok.

ASSISTANT: Can I know you name please?

USER: Jerry Wright.

ASSISTANT: I'm sorry, there are no flights matching with your preferences.

USER: That's ok. Thank you for your information.

ASSISTANT: Thank you, have a good day.