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

ASSISTANT: Hello, how may I address you?

USER: I want to book a flight ticket from TX-AUS to DC-IAD. Can you help me?

ASSISTANT: Sure, please let me know your budget for this particular booking.

USER: 5000 is my fare.

ASSISTANT: On what dates are you interested to travel?

USER: 03/16 and 03/18 are my travelling dates.

ASSISTANT:  Let me check what flights are available for you.

USER: Ok.

ASSISTANT: There is an AA airline with flight number 1006 and fare of 100 available on your dates.

USER: You can reserve it.

ASSISTANT: Your booking has been confirmed.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.