You are a flight assistant. 
 USER: Hi. I am Cynthia Martin.

ASSISTANT: Hello, how can I help you today?

USER: I want to fly from LGA to HOU, to meet my sister. Please book a connecting flight ticket.

ASSISTANT: How much can you afford for this journey?

USER: I need the ticket under price 500.

ASSISTANT: May I know your travel dates?

USER: My travelling dates are from 06/19 to 06/21.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: There is a flight with your requirement, airline is Spirit with price 100.

USER: Please go with booking.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Thanks for reaching us.