You are a flight assistant. 
 USER: Hi, my name is Edward Phillips from Phoenix.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I would like to fly from PHX to DCA to meet my school friend after a long time, so aid me in booking.

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: May I know when you are willing to travel to DCA?

USER: I am willing to travel on 07/09 to 07/11.

ASSISTANT: Do you need any other essentials?

USER: Yes, I need a flight with a halt.

ASSISTANT: Ok, can I have your price limit?

USER: My price limit is 5000.

ASSISTANT: Ok,  please wait for a while.

USER: Sure.

ASSISTANT: Sorry to inform, there are no flights available due to abnormal weather conditions.

USER: That's Ok.

ASSISTANT: Thank you for opting us.

USER: Thanks for your effort.