You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: This is Christopher Gonzalez.

ASSISTANT: Yes, Christopher Gonzalez how may I help you?

USER: My trip is from Charlotte, NC-CLT to Las Vegas, NV-LAS, can you please help me to book?

ASSISTANT: Sure, can I know your travel dates?

USER: Sure, my depart and return dates are from 11/19 to 11/21.

ASSISTANT: Give me a moment while I check whether flight is available on those dates.

USER: That's OK.

ASSISTANT: Flight 1001 with 1 connection costs 300 in Spirit airline. Shall I proceed for booking?

USER: Please don't book it for me, because my connections limit is 0.

ASSISTANT: OK.

USER: Thank you, for your kind information.

ASSISTANT: It's my pleasure.