You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: My name is Brenda Rodriguez. Can you please book me a ticket to San Francisco?

ASSISTANT: Sure, I will help you in booking your flight ticket. Could you please let me know your nearest source and final destination airport codes?

USER: Sure, my source and destination codes are SFO and SFO.

ASSISTANT: Ok. Can I know your travel date please?

USER: Yes, my preferable travelling dates are 01/31 and 02/02.

ASSISTANT: Ok, please hold on for a moment.

USER: Ok, take your time.

ASSISTANT: Delta airlines with flight number 1012 is available with single connection. Do you want me to proceed?

USER: Yes, please book that ticket.

ASSISTANT: Your ticket is confirmed. Happy journey.

USER: Thank you for the much needed help.

ASSISTANT: You are welcome. Thank you for visiting us.