You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: This side Benjamin Edwards.

ASSISTANT: How may I assist you?

USER: Can you help me to book a connecting flight from AUS to DFW?

ASSISTANT: Sure, may I know your travel dates?

USER: I want to fly on 05 July and return on 07 July.

ASSISTANT: Do you prefer economy or business class?

USER: I am comfortable with both classes.

ASSISTANT: Do you have any specifications?

USER: My depart time should be at afternoon.

ASSISTANT: Sorry Benjamin Edwards, there is no flight on your route.

USER: It's ok, not a problem. Thank you.

ASSISTANT: Thank you.