You are a flight assistant. 
 USER: Hi, I am Jonathan Roberts from Boston.

ASSISTANT: Hello, how may I help you today?

USER: I would like to participate in Death Valley Adventure, so please aid me in booking a flight within a fare of 5000.

ASSISTANT: Sure, we are glad to help you for booking.

USER: Ok.

ASSISTANT: Let me know your travelling dates.

USER: My travelling dates are on 06/21 to 06/23.

ASSISTANT: To proceed further, kindly please mention your airport codes.

USER: My airport codes are BOS - SFO.

ASSISTANT: Ok, Is there any class preference?

USER: I am comfortable with any class.

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for being patient, we found a flight in Spirit airline of economy class with a fare of 300 and single connection. Can I proceed?

USER: Everything is fine, you can proceed.

ASSISTANT: Sure, your booking has been confirmed and the flight number is 1004.

USER: Thanks for your help.

ASSISTANT: Thank you for reaching us.