You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you for the day?

USER: I am Gary Lee, want to book a flight ticket to Philadelphia with price under 1000.Can you help me with it?

ASSISTANT: Sure, when you are  willing to travel?

USER: My travel dates are 11/01 and 11/03.

ASSISTANT: May I know your airport codes?

USER: Airport codes are PHX-PHL.

ASSISTANT: Please wait a moment I will recur to you with the details.

USER: Sure.

ASSISTANT: Sorry to inform you, that there were no flights available on your scheduled dates.

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us. Have a great day.

USER: Thanks for the help.