You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you at this minute?

USER: Can you help me in booking my flight ticket from AUS to LGA?

ASSISTANT: Ok, I am here to help you with that. Can I know your planned trip dates?

USER: My planned dates of journey are May 11 and May 13.

ASSISTANT: Ok, may I know your name?

USER: My name is Donna White.

ASSISTANT: Do you have any other requirements?

USER: I prefer to return in afternoon flight.

ASSISTANT: Ok, wait for a minute.

USER: Sure.

ASSISTANT: There is an Spirit airline with flight number 1028 leaving from AUS on May 11th with 1 stop over in the midway and the estimate is 100. Can I proceed with the ticket booking?

USER: Please reserve my ticket in this flight.

ASSISTANT: Sorry to say that, I have rechecked there are no flights available based on your travelling dates.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for reaching us.