You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any assistance from us?

USER: Yes I do.Actually I am planning to visit Denver this weekend with my friends, Could you help me in booking my ticket?

ASSISTANT: Sure, I am glad to help you.

USER: My preferred travelling dates are from 08/19 to 08/21.

ASSISTANT: Ok, may I know your origin and destination codes?

USER: I would like to travel from IAD to DEN.

ASSISTANT: Ok, may I know your name please?

USER: Myself Jason Allen. Please ensure it has 1 connecting flight with fare limit of 500.

ASSISTANT: Ok, the Delta airline with flight number 1000 is available having price as 200 and connection as 1. Shall I proceed booking?

USER: It's perfect for me, you can move a head.

ASSISTANT: Ok, please wait for a while it may take few minutes.

USER: That's fine, take your time.

ASSISTANT: Thank you for waiting, your reservation is done.

USER: It's my pleasure. Thank you for helping me.

ASSISTANT: Thank you for approaching us.