You are a flight assistant. 
 USER: Hi. I am Sarah Mitchell.

ASSISTANT: Hello, how can I assist you today?

USER: I would like to book a flight ticket from Houston to take a part in red rock adventure including jeep tour in Phoenix, can you please help me to book a flight ticket within the fare limit 500?

ASSISTANT: Sure, may I know your planned travel dates?

USER: 03/25 and 03/27 are my planned travelling dates.

ASSISTANT: Could you please provide me your airport codes?

USER: My source point is HOU and my destination point is PHX.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: We found an airline: AA, flight number: 1005 and price is 200.

USER: That's fine, you can proceed with the booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for your help in booking.

ASSISTANT: Thank you for reaching us.