You are a flight assistant. 
 USER: Hello,. I am Mary Thompson.

ASSISTANT: Hello, how may I provide service to you?

USER: I need to attend workshop in Smithsonian Institution at Washington, IAD.

ASSISTANT: OK.

USER: Can you please make a reservation from Houston, HOU?

ASSISTANT: Sure, I can help you in that. May I know your price limit?

USER: Price should be up to 5000.

ASSISTANT: Let me know your panned travel dates?

USER: My journey dates on 03/18 and 03/20.

ASSISTANT: 1002 flight in UA airline is available with a fare of 100.

USER: Ok, proceed with the booking.

ASSISTANT: Would you like me to proceed? Ok, your booking is done.

USER: Thanks for your help.

ASSISTANT: Thanks for approaching us.