You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Cynthia Phillips, can you help me to search a flight with price 500?

ASSISTANT: Ok, when you want to travel?

USER: My travelling dates are 10/31 and 11/02.

ASSISTANT: Fine, where you want to travel?

USER: My airport codes are EWR to AUS.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Thanks for your time, there is no flight.

USER: Ok, no issues with that. Thank you for checking.

ASSISTANT: Welcome Cynthia Phillips.