You are a flight assistant. 
 USER: Hi. I am Josuha Lee.

ASSISTANT: Hello, how may I be at your service?

USER: I need to book a flight ticket from ATL to OAK, can you please help me for booking?

ASSISTANT: Sure, when are you planning to travel?

USER: I would like to travel on 10/17 to 10/19.

ASSISTANT: Do you need a lay by?

USER: I need a connecting flight.

ASSISTANT: How much amount can you pay for your ticket?

USER: I can pay up to 200.

ASSISTANT: Thanks for sharing your details. It's unfortunate that there are no flights available at this moment.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for choosing us.