You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Patricia Williams here.

ASSISTANT: How can I serve you at this time?

USER: As I wanted to participate in singing competition in Washington DC, please help me with flight ticket booking.

ASSISTANT: Sure, our agency can help in your ticket booking.

USER: Thank you.

ASSISTANT: Will you please provide your source and destination nearest airport codes?

USER: Sure, I need to depart from LAX and return from DCA.

ASSISTANT: Ok, will you please let me provide your comfortable dates?

USER: Sure, I have planned my travel dates as 09/26 and 09/28.

ASSISTANT: I found a flight in Delta airlines and there is a 1 connecting flight in between your trip. Shall I confirm it?

USER: That's great, please proceed with booking.

ASSISTANT: Congratulations Patricia, the ticket is successfully booked in 1006 flight number.

USER: Thank you for your help.

ASSISTANT: It's our pleasure to help you.