You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Timothy Turner.

ASSISTANT: How can I guide you for today?

USER: I am planning to attend music concert at Washington, can you please help me with that?

ASSISTANT: I will help you with that.

USER: Thank you.

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: Sure, I would like to take off on 07/26 and return on 07/28.

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

USER: My source airport code is LAX and the destination airport code is IAD.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: Yes, make sure that the price limit does not exceed 500.

ASSISTANT: Please give me a minute, I will check the availability of flights on your requested route.

USER: Sure, take your time.

ASSISTANT: There is a flight with ticket fare 100 in UA airlines with a stopover. Is it ok for you?

USER: Yes, please proceed with the booking.

ASSISTANT: Your booking is confirmed with flight number 1004.

USER: I really appreciate your help, thank you for your service.

ASSISTANT: Thank you for contacting us, have a safe journey.

USER: You are welcome.