You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Sandra Collins here.

ASSISTANT: Sandra, how can I assist you?

USER: I have to go Chicago for my film shooting purpose, can you please book a flight ticket from HOU to ORD?

ASSISTANT: Sure, I am here to aid you. Could you please help me with your travel dates?

USER: Ok, my planned journey dates are 03/25 and 03/27.

ASSISTANT: Ok, please wait for a while.

USER: Ok, carry on.

ASSISTANT: There is a flight available with business class in Frontier airlines and the ticket fare is 400 only. Shall I book the ticket for you?

USER: It's perfect, please confirm this flight ticket.

ASSISTANT: Sandra, your ticket is booked and your flight number is 1023.

USER: Thank you for your service.

ASSISTANT: You are welcome and thank you for choosing us.