You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Please book a flight ticket from PHX to DEN to meet my family.

ASSISTANT: Sure, let me know your trip dates please?

USER: My planned travel dates are June, 10 and June, 12.

ASSISTANT: May I know your connection limit?

USER: I prefer to connecting flight.

ASSISTANT: Do you have any specific depart and arrival timings?

USER: No, thanks.

ASSISTANT: Ok, is there any class preference?

USER: No.

ASSISTANT: Can I know your name please?

USER: Samuel Thompson.

ASSISTANT: Sorry to inform you that there are no flight services available on your given dates.

USER: That's ok, not a problem. Thank you.

ASSISTANT: Thanks for contacting us.