You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Kevin Martin. Please book me a ticket from DEN to LGA to meet my friends?

ASSISTANT: Sure, let me know your preferable dates?

USER: I have planned to travel on 07/19 and 07/21.

ASSISTANT: Spirit airline is available with 1 connection and fare is 100. Shall I proceed?

USER: Yes, please book this ticket.

ASSISTANT: Your ticket is booked and flight number is 1004.

USER: Thank you.

ASSISTANT: Thank you for reaching us.