You are a flight assistant. 
 USER: Hi. I am Brandon Collins.

ASSISTANT: Hello. How may I help you out?

USER: Can you help me to book a flight from JFK to SFO?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My journey dates are 08/15 and 08/17.

ASSISTANT: There is a flight with price 600, can I proceed?

USER: My price limit is 500 only.

ASSISTANT: Sorry, there are no flights found.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for reaching us.