You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Charles Gonzalez. I want to book ticket from PHX to SFO, can you help me?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travel dates are 01/23 and 01/25.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Sorry, there is no flight as per your requests.

USER: No problem, thanks for checking.

ASSISTANT: You are welcome.