You are a flight assistant. 
 USER: Hello, I am Stephanie Davis.

ASSISTANT: Hello, How can I serve you?

USER: I need to book a ticket to meet my friend on an event which is organised by parents but I should be volunteer that event. Can you please book me a ticket?

ASSISTANT: Sure, May I know the journey codes?

USER: I would like to fly on 02/27 and return on 02/29.

ASSISTANT: Please help me with your travel codes.

USER: My travel codes are from LAS to AUS.

ASSISTANT: Please wait a second.

USER: Ok.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Ok, no problem. Thanks for your service.

ASSISTANT: Thank you for opting us.