You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am Nicholas Harris.

ASSISTANT: Ok.

USER: I am planning to meet my school friend in Minneapolis & St. Paul, so please book a flight ticket from SFO to MSP.

ASSISTANT: Sure, I am here to help you. When you are willing to travel?

USER: I want to fly on June 22, return on June 24.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: Which class would you like to prefer?

USER: I am comfortable with any class.

ASSISTANT: Ok, please wait for some time.

USER: Sure.

ASSISTANT: Thanks for waiting. Sorry, there are no flights found with your specifications.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.