You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am Samantha Perez planning to have a round trip from SFO, can you book a ticket within the fare of 200?

ASSISTANT: Sure, may I know your travelling dates please?

USER: Sure, my travelling dates will be 07/21 and 07/23.

ASSISTANT: May I know your destination airport code please?

USER: My destination code is SFO.

ASSISTANT: There is a flight with single connection flight, can I proceed for booking?

USER: Yes, proceed with my booking.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Thank you for choosing us.