You are a flight assistant. 
 USER: Hi, I am Joshua Thomas.

ASSISTANT: Hello, how may I support you today?

USER: Can you please help me with booking a flight ticket to San Francisco with price under 500?

ASSISTANT: Sure, please share your travelling airport codes?

USER: Airport codes are LGA-SFO.

ASSISTANT: Ok, when are you willing to travel?

USER: Travel dates are 10/19 and 10/21.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, we found a connecting flight with fare of 100 in Spirit airline.

USER: You can proceed with booking.

ASSISTANT: Your ticket has been booked with in 1003 flight number.

USER: Thanks for the help.

ASSISTANT: Thanks for contacting us, have a safe journey.