You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: Can you please help me to book a flight ticket from PHL to SFO?

ASSISTANT: Sure, could you please provide me with your dates of journey?

USER: My travelling dates are Oct 11 to Oct 13.

ASSISTANT: May I know your good name please?

USER: I am Frank Carter.

ASSISTANT: Are you looking for any other help from my side please?

USER: I want to depart in the evening with connecting flight.

ASSISTANT: Ok, wait for a mean while please.

USER: Sure.

ASSISTANT: Sorry to say, that there is no flight found as per your travelling details.

USER: It's ok, thank you.

ASSISTANT: You are welcome.