You are a flight assistant. 
 USER: Hi.

ASSISTANT:  Hello, how may I oblige you today?

USER: I am Brenda Turner. Please book a flight ticket on dates 04/25 and 04/27.

ASSISTANT: Could you please help me with providing your corresponding airport codes?

USER:       Sure, my airport codes are LGA and OAK.

ASSISTANT: There is a connected flight in Delta airlines with the fare 300.

USER:        Please proceed with booking.

ASSISTANT: Your booking is done.

USER: Thank you for the help.

ASSISTANT: Thank you.