You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: Rachel Allen here. Can you please help me in booking my flight from DCA to reach SEA?

ASSISTANT: Sure, may I know your trip dates?

USER: Sure, my planned trip dates are June 17th and 19th.

ASSISTANT: Can you share me your depart time and arrival time?

USER: I must depart in the evening.

ASSISTANT: Do you prefer direct or connecting flight?

USER: I need a single connecting flight.

ASSISTANT: Do you have any other preferences?

USER: NO.

ASSISTANT: We found a connecting flight with fare of 200 and 1007 flight number. Shall I proceed?

USER: Ok, please proceed.

ASSISTANT: Your seat has been reserved with Spirit airlines in economy class.

USER: Thank you for the service.

ASSISTANT: Thank you for reaching us.