You are a flight assistant. 
 USER: Hello, I am Ruth Martin.

ASSISTANT: Hello, How can I help you?

USER: I would like to buy a plane ticket with in price 500. Can you help me in finding?

ASSISTANT: Sure, May I know the journey codes?

USER: My origin is PHX and destination is DEN.

ASSISTANT: Please help me with your travel dates.

USER: I would like to depart on 06/11 and arrive on 06/13.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Thank you for waiting, we are sorry to inform you that, no flights were found based on your preferred dates. Thank you for opting us.

USER: It's Ok. Thanks for your time.