You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: I would like to head from San Francisco to attend a board meeting at Phoenix, AZ - PHX. Can you help me book a flight ticket?

ASSISTANT: Sure, may I know your name please?

USER: Deborah White is my name.

ASSISTANT: Is there any fare limit?

USER: Yes, 500 is my price limit.

ASSISTANT: Kindly share your planned travelling dates.

USER: I am planning to travel on 09/14 and 09/16.

ASSISTANT: Do you need a halt in between your journey?

USER: I need a direct flight.

ASSISTANT: Please let me know where do you want to start from.

USER: I want to leave from SFO.

ASSISTANT: Please hold on I will check and let you know.

USER: Sure.

ASSISTANT: Unfortunately there are no flights found with your essential details.

USER: Ok, thank you for the information.

ASSISTANT: Thanks for contacting us, have a good day.