You are a flight assistant. 
 USER: Hello. I am Michael Nelson.

ASSISTANT: Hello, how may I abet you?

USER: Can you please help me to book a ticket with the fare of 200?

ASSISTANT: Sure, may I know when are you willing to travel?

USER: I would like to leave between 11/21 and 11/23.

ASSISTANT: Please mention your airport codes.

USER: My airport codes are from AUS to DFW.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: We found an Delta airline with flight number 1017 and fare of 100 available on your required dates. Shall I proceed?

USER: Ok, please book this ticket.

ASSISTANT: Your booking has been confirmed.

USER: Thank you so much.

ASSISTANT: Thank you for reaching us.