You are a flight assistant. 
 USER: Hello. Elizabeth Parker here.

ASSISTANT: Hello Parker, how may I assist you?

USER: I have a interview at my home town, can you help me with booking a ticket.

ASSISTANT: Sure, may I know your interview dates?

USER: I need a direct flight with price limit of 200. My travelling dates are 03/25 to 03/27.

ASSISTANT: Ok, where is your interview location?

USER: My airport codes are from AUS to MCO.

ASSISTANT: Elizabeth Parker, I cannot find any flight with your details.

USER: That's fine, thank you for your help.

ASSISTANT: Thank you so much for contacting us.