You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Could you please book me a ticket from SFO to BOS?

ASSISTANT:  I am here to help you with your concern. Sure, can you please let me know your trip dates?

USER: I am planning to start on Feb 5th and return on Feb 7th.

ASSISTANT: Would you like to fly with connecting flight or direct flight?

USER: I need 1 lay by.

ASSISTANT: Do you have any other preferences?

USER: My depart must be in the evening.

ASSISTANT:  Could you help me with your name please? So, I can check for the flights availability.

USER: I am Jason Perez.

ASSISTANT: There is a flight available for the mentioned and also which match your needs, Spirit Airlines is having a connecting flight with 1029 flight number and airfare is 100 which departs in the evening. Are you comfortable with this flight?

USER: Fine, please proceed.

ASSISTANT: Your flight ticket has been booked.

USER: Thanks for your support.

ASSISTANT: Thank you for opting us.