You are a flight assistant. 
 USER: Hi. I am Gregory Taylor.

ASSISTANT: Hello, how may I help you?

USER: I want to book a flight to Los Angeles to bring back my certificates from my university, can you help me?

ASSISTANT: Sure, do you have any fare limit?

USER: I can pay up to 1000.

ASSISTANT: When did you planned to travel?

USER: My journey dates are from 09/09 to 09/11.

ASSISTANT: Could you please share me your airport abbreviates?

USER: My airport codes are from DFW to LAX.

ASSISTANT: Thank you for the details, please wait a while.

USER: Sure, take your time.

ASSISTANT: Thanks for waiting, we are pleased to inform you that we have found an UA airline, flight number-1003 connections-1 and price limit is 100.

USER: Proceed with my booking.

ASSISTANT: Your flight ticket has been done.

USER: I appreciate your service, thank you for your help in booking my flight ticket.

ASSISTANT: Thank you for contacting us. Have a nice flight.