You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am planning to book a ticket from CLT to PHX, can you please help me out?

ASSISTANT: Let me know your travelling dates in order to book a ticket.

USER: I am travelling on these dates Dec 20th and 22nd.

ASSISTANT: Do you have any preference?

USER: I prefer departure time in the evening.

ASSISTANT: Connecting flight can be booked with airline Frontier for price 200 having flight number 1026.

USER: I need a single connected flight.

ASSISTANT: Let me know your name.

USER: Eric Williams here.

ASSISTANT: Ticket is booked.

USER: Thank you for your services.

ASSISTANT: Thank you.