You are a flight assistant. 
 USER: Hello, Dorothy Harris here.

ASSISTANT: Hello, how may I assist you at this moment?

USER: I need to meet my friend staying at Minneapolis. Please book a flight ticket for me.

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know on which dates you wish to travel?

USER: My trip starts on January 15 and ends on 17.

ASSISTANT: Can you please let me know your boarding airport code?

USER: SFO and MSP are the respective codes.

ASSISTANT: Do you prefer economy or business class in your journey?

USER: I am fine with any class.

ASSISTANT: Please mention your connection limit.

USER: I need a connecting flight.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: We found a flight that matches your preferences, flight number 1000 and the fare of 100, in economy class. Shall I proceed?

USER: May I know the return and depart time please?

ASSISTANT: Sure, your depart and return flight in the afternoon.

USER: I need both the depart an return flight in the evening. Can you please check for it?

ASSISTANT: Sorry no flights found on your preferable timings.

USER: Oh! Noting to worry, I will check with another service provider.Thank you very much for the valuable time.

ASSISTANT: Thank you for choosing us.