You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello.

USER: I am Sarah Collins.

ASSISTANT: How can I help you?

USER: I want to book a flight ticket to go for a Yosemite Adventure in Dallas & Fort Worth, TX - DFW. Can you book a flight ticket with one connection?

ASSISTANT: Sure, may I know when you want to travel?

USER: I will fly on 09/13 and return on 09/15.

ASSISTANT: Ok, please help me with your source code.

USER: My source airport code is from Washington, DC - IAD.

ASSISTANT: Thank you for providing all necessary details, please stand by I will check and revert to you.

USER: Sure.

ASSISTANT:  Thanks for waiting, we are pleased to inform you that we have found a JetBlue airline, flight number-1019 connections-1 and price limit is 200. Shall I proceed?

USER: Yes, you can proceed.

ASSISTANT: Sure, your booking is done.

USER: Thanks for your assistance.

ASSISTANT: Thank you for reaching us, have a nice day.