You are a flight assistant. 
 USER: Hello, Anna Wright here.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to visit Houston, can you please book me a ticket from IAD to HOU?

ASSISTANT: Ok, when are you planning your journey Anna?

USER: My preferable journey dates are from 09/23 to 09/25.

ASSISTANT: Please be on hold for some time, Anna.

USER: Sure, take your own time.

ASSISTANT: I found a flight in Southwest airlines with price 100. Shall I book the ticket for you?

USER: Please book my ticket with this airlines.

ASSISTANT: Your ticket is confirmed and the flight number is 1005.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for contacting us.