You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you at this moment?

USER: I am Karen Gonzalez and I need to book a flight from DFW, so please help me in booking a flight to reach San Francisco.

ASSISTANT: Sure, I will aid you with that. Can you please mention your preferable travel dates?

USER: My journey dates are on Feb 5th to 7th.

ASSISTANT: May I know your destination airport code name?

USER: My destination airport code is SFO.

ASSISTANT: Do you have any preferences regarding timings of your journey?

USER: My return time is afternoon.

ASSISTANT: May I know your connection limit?

USER: I need a single connection.

ASSISTANT: Do you have any another specifications?

USER: No.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: No issues, thank you.

ASSISTANT: Thank you for reaching us.