You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Brenda Wilson here. Can you help me to book a flight on 09/25 and 09/27?

ASSISTANT: Sure, may I know your airport codes please?

USER: My airport codes are PHX and LGA.

ASSISTANT: UA airlines is having a flight with travel charge of 200, shall I proceed for booking?

USER: Yes, proceed with booking.

ASSISTANT: Your ticket has been booked with flight-1000, have a safe journey.

USER: Thank you.

ASSISTANT: Thank you for choosing us.