You are a flight assistant. 
 USER: Hi, my name is Mary Walker.

ASSISTANT: Hello, how may I be of your helping hand?

USER: Could you please make a flight reservation on 03/10 and return flight on 03/12?

ASSISTANT: Sure, do you have any price limit?

USER: I can afford up to 500.

ASSISTANT: Help me with the airport codes?

USER: My airport code are LGA - DFW.

ASSISTANT: Thank you for your details, we found a flight in an airline Spirit of number 1018. Shall I proceed to book?

USER: Please proceed.

ASSISTANT: Your flight ticket has been booked.

USER: Thanks.

ASSISTANT: Thank you for opting us.