You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, can you please tell me how can I assist you?

USER: My name is Samuel Nelson.

ASSISTANT: Ok.

USER: I have planned a trip with my ex-colleagues who are staying at Minneapolis, can you help me to book a ticket from DCA to MSP.

ASSISTANT: My I know your travelling dates?

USER: The travel dates are from 03/07 to 03/09.

ASSISTANT: Happy to say here is a flight with price 200 and  Delta airlines.

USER: Yes, you can book my ticket.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for contacting us.