You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you today?

USER: I am Charles Williams want to book a flight ticket on dates 07/04 and 07/06, can you help me with booking please?

ASSISTANT: Sure, we are here to help you. Kindly mention your airport codes.

USER: Sure, my airport codes are CA-SFO and CA-LAX.

ASSISTANT: How much can you afford for this journey?

USER: I can pay up to 200.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: There is a flight with your requirement, airline is AA with price 200.

USER: Please proceed with booking.

ASSISTANT: Your booking is done and flight number is 1027.

USER: Thank you.

ASSISTANT: Thanks for reaching us.