You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you today?

USER: I am Jeffrey Williams. Could you help me in booking a flight ticket from San Francisco to Minneapolis & St. Paul on 05/29?

ASSISTANT: Sure, may I know your boarding and landing airport codes?

USER: My source and destination airport codes are CA - SFO, MN - MSP.

ASSISTANT: May I know your arrival date?

USER: I want to return on 05/31.

ASSISTANT: Do you need any halt in between journey?

USER: Yes, I need a halt.

ASSISTANT: Thanks for your details, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for your time, there are no flights found on your requested travel dates.

USER: No problem, thank you.

ASSISTANT: Thank you for contacting us.