You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you for the day?

USER: I need to attend a meeting very urgently, can you book a direct flight for me?

ASSISTANT: Sure, help me with the trip dates?

USER: Sure, I would like to depart from my location on 29th May and I want to return back by 31st May.

ASSISTANT: May I know your airport codes that you wish to board and land?

USER: My source and destination airport codes are LAX and SFO.

ASSISTANT: On whose name should I make the reservation?

USER: Book it on the name Barbara Brown.

ASSISTANT: Sorry, no flights found in your desired routes.

USER: Oh! That's ok, thank you for giving the information.

ASSISTANT: Thank you for reaching us. Have a nice day.