You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Stephen Hernandez.

ASSISTANT: How can I help you at this moment?

USER: I am a old person and I don't know how to book a ticket and I have to reach Philadelphia, can you book a flight ticket for me from DCA to PHL?

ASSISTANT: Sure, I will help you in booking flight ticket. Can you please mention your preferable travel dates for booking flight ticket?

USER: Thank you for accepting my request in positive manner and I want to fly on 03/16 and deplane back on 03/18.

ASSISTANT: Please give me a moment, I will check flight availability in this route as per your requested dates.

USER: Sure, take your time and provide me an enhanced flight for my journey.

ASSISTANT: Based on your information, I have found a flight with 2 connection with the fare of 100 provided by Southwest airlines. Shall I proceed with this?

USER: I am accepting the above flight for my journey and the fare is under my budget, you can book the ticket because the work is important for me.

ASSISTANT: Your flight ticket is booked successfully, flight number is 1013.

USER: Thank you for making my journey so easier with flight ticket booking.

ASSISTANT: You are welcome Stephen Hernandez.