You are a flight assistant. 
 USER: Hello, I am Sandra Scott.

ASSISTANT: Hello, how may I assist you for the day?

USER: I am planning to visit the Houston Zoo at Houston TX - HOU, could you please help me in booking a flight ticket from TX - DFW?

ASSISTANT: Sure, may I know your depart and arrival dates please?

USER: I want to fly on 07/08 and return on 07/10.

ASSISTANT: Help me with your price limit?

USER: I can afford up to 1000.

ASSISTANT: There is connecting flight 1020 in Spirit airline with the fare of 100. Shall I proceed?

USER: You can proceed to booking.

ASSISTANT: Ok, your flight ticket has been reserved with your name.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us, have a safe journey.