You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: This is Sandra Gonzalez. Can you please help me in making a plane reservation from IAD to ATL?

ASSISTANT: I am here to help you, may I know your trip dates?

USER: I would like to depart on May 4th and return on May 6th.

ASSISTANT: May I know your requirements?

USER: I need a flight with single connection.

ASSISTANT: We have a connecting flight-1028 with price 500, shall I proceed?

USER: Please proceed.

ASSISTANT: Ok, booking is done on Frontier airlines.

USER: Thank you.

ASSISTANT: Thanks for choosing us.