You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Sure, I am here to help you in booking. Can you please share your travel dates?

USER: I planned my trip on the dates Jan 21 and Jan 23.

ASSISTANT: May I know your name to proceed further?

USER: Myself Ashley White.

ASSISTANT: Let me know your connection limit.

USER: I am looking for a connecting flight.

ASSISTANT: Do you have any specification?

USER: I prefer afternoon flight at the time of take off.

ASSISTANT: Sorry, currently no flights are available on your route.

USER: No issue, anyway thank you for checking.

ASSISTANT: Thank you for reaching us, have a nice day.