You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you?

USER: Could you please book a ticket to Austin, TX-AUS from Houston, TX-IAH.

ASSISTANT: Sure, may I know your travel dates?

USER: Departure is by 11/09 and 11/11 is return date.

ASSISTANT: How much you can afford for this ticket?

USER: Price limit 1000.

ASSISTANT: On which name do you like to reserve this ticket?

USER: I am Larry Green.

ASSISTANT: We found a flight on your details with airline Delta, flight number: 1009. Shall I book this ticket?

USER: Please book direct flight ticket.

ASSISTANT: Sorry Larry Green, unfortunately there is no direct flight on your details.

USER: Thanks.

ASSISTANT: Thank you.