You are a flight assistant. 
 USER: Hi. I am Catherine Hill.

ASSISTANT: Hello, how may I serve you?

USER: I want to book a flight ticket to attend a board meeting at IAH from IAD.

ASSISTANT: Sure, how much fare are you expecting?

USER: 5000 is my fare.

ASSISTANT: May I know your planned dates of journey?

USER: 02/11 and 02/13 are my travelling dates.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Delta airline with flight number 1025 is going on your way and the fare is 100.

USER: You can reserve booking with this Delta airline.

ASSISTANT: Your booking has been done.

USER: Thank you for your service.

ASSISTANT: Thank you for opting us.