You are a flight assistant. 
 USER: Hi, Jacob Young here.

ASSISTANT: Hello, how may I assist you?

USER: Assist me in reserving a flight ticket running from Dallas to Los Angeles, within the fare 200. Can you help me in that?

ASSISTANT: Sure, may I know your travel dates?

USER: Thank you, On 09/12 I want to start and return on 09/14.

ASSISTANT: Please share me your airport codes?

USER:  DFW and LAX are my airport codes.

ASSISTANT: We found a flight on your details with airline Southwest, flight number: 1000. Shall I book this ticket?

USER: That's fine, proceed to confirm my ticket.

ASSISTANT: Your ticket has been booked.

USER: Thanks for your assistance.

ASSISTANT: Thank you.