You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Will you please assist me to make a plane reservation from PHX to reach SFO?

ASSISTANT: Sure, please share your planned travel dates?

USER: Sure, my planned dates are on Mar 11th to 13th.

ASSISTANT: Do you have any connection limit?

USER: Yes, I prefer it.

ASSISTANT: Any other preferences?

USER: No.

ASSISTANT: Can I have your name please?

USER: Sure, Timothy Thompson here.

ASSISTANT: Sorry, no flights found with your given dates.

USER: No problem, thank you.

ASSISTANT: Thank you for opting us.