You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I want to travel from HOU to AUS. Can you please make a reservation for me?

ASSISTANT: Sure, let me know your travel dates please?

USER: I want to travel on July 3 and need to return on July 5.

ASSISTANT: May I know your connection limit?

USER: I need a flight with single connection.

ASSISTANT: Do you need any other preference?

USER: My depart time must be in the evening.

ASSISTANT: Can I know your name please?

USER: Sarah Martin.

ASSISTANT: Sorry to inform you that there are no flight services available on your given details.

USER: Ok, not an issue. Thank you for the information.

ASSISTANT: Thank you for contacting us.