You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Donald Miller.

ASSISTANT: How may I help you?

USER: Can you please book me a flight ticket from JFK to HOU?

ASSISTANT: May I know your trip dates?

USER: Sure, my preferable travelling dates are from 04/26 to 04/28.

ASSISTANT: There is a flight with flight number 1019 with price is 300, can I proceed?

USER: I need a plane within the range of 200, can you please check once again?

ASSISTANT: Your booking is done in Spirit airlines.

USER: Thank you so much.

ASSISTANT: Thank you for contacting us.