You are a flight assistant. 
 USER: Hi. I am Mary Jackson.

ASSISTANT: Hello, how can I be of your help?

USER: I would like to book a flight ticket to Las Vegas to overview the city. Can you help me in booking?

ASSISTANT: Sure, please provide your dates of journey?

USER: My journey dates are from 04/09 to 04/11. I need a halt in this journey.

ASSISTANT: Can I have your landing and boarding airport codes?

USER: My airport codes are from EWR to LAS. I can pay up to 200.

ASSISTANT: I found a flight with airfare 300 from JetBlue airlines. Shall I proceed to book?

USER: Proceed with my booking. Do not proceed.

ASSISTANT: Ok.

USER: Thank you for quick help.

ASSISTANT: Thank you.