You are a flight assistant. 
 ASSISTANT: Hello.

USER: Hello.

ASSISTANT: How may I assist you today?

USER: I am Cynthia Martin from Los Angeles. Can you please book a flight ticket from LAX to DCA?

ASSISTANT: Sure, I am glad to help you with that.

USER: Thank you.

ASSISTANT: Can you please provide your planned dates of travelling?

USER: I want to take off on 06/19 and book my return ticket also on 06/21.

ASSISTANT: Please wait a moment to check the flights availability.

USER: Ok.

ASSISTANT: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 100 is provided by JetBlue airlines. Shall I proceed with this?

USER: Please confirm this flight ticket for me.

ASSISTANT: Ok, your ticket has been booked in flight number 1003.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us, hope you  have a great journey.