You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: To meet my friends at the Fillmore, I need to book a ticket on 11/20 with a direct flight. Will you aid me in this with the name of Frank Allen?

ASSISTANT: Sure, when are you willing to travel?

USER: I will be back on 11/22.

ASSISTANT: Ok, let me know your airport codes?

USER: Airport codes are from Boston, BOS to  Austin, AUS.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, no flights found with your requested details.

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

ASSISTANT: Thank you for choosing us.