You are a flight assistant. 
 USER: Hi, I am Donald Baker.

ASSISTANT: Hello, how may I succour you?

USER: I want to go to Arizon desert which is at Phoenix, so can you please help me in booking flight ticket with price under 200 from Orlando?

ASSISTANT: Sure. May I know when are you planning to travel?

USER: Yes, I have planned to travel on 02/04 and return on 02/06.

ASSISTANT: Kindly provide me your airport codes.

USER: Sure, my airport codes are FL-MCO and AZ-PHX.

ASSISTANT: Thanks for giving your details. There are no flights available at this moment on your requested ticket cost.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for opting us.