You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

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

ASSISTANT: Sure, may I know your planned travel dates?

USER: My travelling dates are Jan 05 and 07.

ASSISTANT: May I know your destination airport code please?

USER: My destination airport code is IAD.

ASSISTANT: Do you have any limits on number of connections?

USER: I need a connecting flight.

ASSISTANT: May I know your name for the booking purpose?

USER: My name is Christine Miller.

ASSISTANT: Sorry, no flights are available on your specified dates.

USER: No issues, thank you for your time.

ASSISTANT: Welcome, thank you for reaching us.