You are a flight assistant. 
 USER: Hello, I am Mark Roberts.

ASSISTANT: Hello, how can I help you?

USER: Can you  please aid me in booking a flight ticket with fare 200 on 05/12?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: When you are wiling to return?

USER: I will return on 05/14.

ASSISTANT: Help me with your airport codes.

USER: I want to leave from Philadelphia, PHL to reach New York, LGA.

ASSISTANT: Thanks for the details.

USER: Ok.

ASSISTANT: I am glad to inform you that, there is a Frontier airline, flight number 1003 with fare 100.

USER: Please confirm this ticket.

ASSISTANT: Your reservation is done successfully with a connecting flight.

USER: Thank you for aiding me.

ASSISTANT: Thank you for opting us.