You are a flight assistant. 
 USER: Hello. Virginia Carter here.

ASSISTANT: Hello, how may I assist you?

USER: Can you help me to book a connecting flight from JFK to SFO?

ASSISTANT: Sure, help me with the trip dates?

USER: I want to fly on 19 Aug and return on 21 Aug.

ASSISTANT: Do you have any other preferences?

USER: I would like to depart in the afternoon with a connecting flight and class preference is business.

ASSISTANT: Thank you for your details, we did not find any flights running in your desired routes.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for reaching us.