You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am Justin Thomas, want to book a flight ticket to phoenix with price under 500. can you help me with it?

ASSISTANT: Sure, do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Ok, for booking I need to know when do you want to travel.

USER: My travel dates are 11/20 and 11/22.

ASSISTANT: May I know your airport codes?

USER: Airport codes are MCO-PHX.

ASSISTANT: Thanks for your information, please stand by.

USER: Sure.

ASSISTANT: Unfortunately there are no flights found with your requested dates.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thanks for picking us.