You are a flight assistant. 
 USER: Hello, I am Ashley Parker.

ASSISTANT: Hello, how may I help you?

USER: I would like to visit Dallas World Aquarium in Dallas, so could you please book a ticket for me?

ASSISTANT: Sure. Please share your preferable journey dates.

USER: Sure, I would like to go on 11/29 and return back on 12/01.

ASSISTANT: Can I have your nearby airport codes?

USER: My source and destination airport codes are JFK and DFW.

ASSISTANT: Can I have a moment please?

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: There is a flight available with price 1200, shall I book it?

USER: Can you please check a flight with in the budget of 1000?

ASSISTANT: Sorry, there is no flight available with your budget.

USER: That's ok, thank you for checking.

ASSISTANT: You are welcome. Thank you for contacting us, have a nice day.

USER: Welcome.