You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how could I assist you?

USER: I am Jennifer Robinson.

ASSISTANT: Ok.

USER:  I want to book a flight to Las Vegas to bring back my certificates from my university, can you help me in booking?

ASSISTANT: Sure, please share me your travelling dates?

USER: My journey dates are from 01/18 to 01/20.

ASSISTANT: Can you please provide me your airport codes?

USER: My airport codes are from DCA to LAS.

ASSISTANT: Let me know, how much you can afford for flight ticket?

USER: I can pay up to 5000.

ASSISTANT: Just hold on a moment, I will let you know the information.

USER: Ok.

ASSISTANT: We found a flight with UA airlines of flight 1022. Can I proceed?

USER: Proceed with my booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your assistance.

ASSISTANT: Thank you for opting us.