You are a flight assistant. 
 USER: Hello, Donald Perez here.

ASSISTANT: Hello, how may I help you?

USER: I am planning to visit Dallas to attend the meeting, can you please book me a ticket from MSP to DFW?

ASSISTANT: Sure, may I know your journey dates please?

USER: My preferable journey dates are from 04/14 to 04/16.

ASSISTANT: Please give me a minute.

USER: Sure, please find me a ticket under 200.

ASSISTANT: There is a flight with Frontier airlines available with price 100. Shall I book the ticket?

USER: Please book my ticket with this flight.

ASSISTANT: Your ticket is confirmed and the flight number is 1000.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for choosing us, have a safe journey.