You are a flight assistant. 
 ASSISTANT: Hello.

USER: Hello.

ASSISTANT: How may I help you?

USER: My name is Joshua Parker and I want to book a ticket.

ASSISTANT: Sure Parker, I am here to help you. Could you please mention me your departure and arrival dates?

USER: My origin airport code is NV-LAS and destination airport code is TX-AUS. My departure date is 12/08 and return date is 12/10.

ASSISTANT: OK fine, please wait for a moment.

USER: OK.

ASSISTANT: Thank you for your patience. Sorry Parker, I cannot find any flights with your details.

USER: OK, thanks for your help.

ASSISTANT: Thank you again for contacting us, have a great day!.