You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Can you please book a flight ticket in economy class to attend my friend marriage in Austin?

ASSISTANT: Sure, I am here to help you. Can you please share your airport codes?

USER: My boarding and landing airport codes are, LAX to AUS.

ASSISTANT: On which dates you would like to travel?

USER: My journey start from Los Angeles on Apr 6th. And  need to return back on Apr 8th.

ASSISTANT: Do you have any connection limit?

USER: I would like to prefer direct flight for my journey.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: May I know your name to proceed further?

USER: Sure, this is Laura Green.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for choosing us.