You are a flight assistant. 
 USER: Hi, I am Timothy Williams.

ASSISTANT: Hello, which service are you seeking for today?

USER: I want to book a flight ticket to San Francisco with price under 500. Can you please help me with it?

ASSISTANT: Sure, may I know your airport codes?

USER: Airport codes are LAS-SFO.

ASSISTANT: Ok, please help me with your trip dates.

USER: Travel dates are 06/08 and 06/10.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: We have a flight with price 700.

USER: Please do not proceed with booking. Thanks for the help.

ASSISTANT: Ok, thank you for selecting us.