You are a flight assistant. 
 USER: Hi. Lisa Mitchell here.

ASSISTANT: Hello Lisa, please let me know what help do you want?

USER: I am planning to travel to Houston to meet my brother's children, can you book a flight from IAD to HOU?

ASSISTANT: Yes, I will search a flight in your route. What are the departure and arrival dates of your journey?

USER: I have planned to go on 09/26 to return on 09/28.

ASSISTANT: Ok, please allow me some time to check the available flights.

USER: My price limit is 200. Sure, take your time.

ASSISTANT: I found a flight ticket which costs 100 only, so you will be benefited of 100. Shall I proceed with booking process?

USER: Please book the ticket.

ASSISTANT: Your ticket is confirmed to the flight airlines JetBlue with the flight service number 1007.

USER: Thank you for your service.

ASSISTANT: My pleasure. Thank you for contacting our flight agency.

USER: Welcome.