You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Donald King.

ASSISTANT: How can I assist you today?

USER: I have to consult a doctor due to some health issue who lives in New York. Can you help me for booking a flight ticket?

ASSISTANT: Sure, I will help you in booking. Can you please share your airport codes?

USER: My source airport cod is IAH and destination airport code is JFK.

ASSISTANT: On which dates you want to travel?

USER: My travelling dates are from 12/04 till 12/06.

ASSISTANT: Here, I found a flight for you with 1 connection ans fare is 700. Shall I proceed?

USER: No, I can afford up to 200.

ASSISTANT: Sorry, no flights are available within your budget.

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

ASSISTANT: Welcome, have a nice day.