You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am planning to go for ATL on 09/21 date, can you please help me out?

ASSISTANT: Sure, may I know your source airport code and return date please?

USER: Ok, source code is IAH and my return date is 09/23.

ASSISTANT: Spirit airlines is having a flight on that route with travel charge of 100, shall I proceed for booking?

USER: Myself Christine Turner, please proceed.

ASSISTANT: Your ticket has been booked with flight-1025, have a safe journey.

USER: Thank you.

ASSISTANT: Thank you for choosing us.