You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I would like to meet my friend at Austin, can you please help me to book my flight ticket from HOU to AUS?

ASSISTANT: Sure, may I know your good name please?

USER: My name is Ruth Lewis.

ASSISTANT: Ok, may I know on which dates you are willing to travel?

USER: I have to depart on Apr 25 and return back on Apr 27.

ASSISTANT: Ok, may I know your connection limit please?

USER: I need a flight with single connection.

ASSISTANT: Do you have any other specifications please?

USER: Yes, I would like to depart in the evening.

ASSISTANT: Sorry Lewis, there is no flight found as per your travelling details.

USER: Not an issue. Anyway, thank you for checking.

ASSISTANT: Thank you for opting us.