You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Donald Lee.

ASSISTANT: How may I serve you today?

USER: I want to travel from IAD to HOU location, can you please book a flight ticket for me?

ASSISTANT: Sure, help me with your preferable dates.

USER: Yes, I want to travel from 11/21 and 11/23 dates.

ASSISTANT: Ok, I got a flight on airline Delta based on your details. Shall I proceed?

USER: Sure, please proceed with it.

ASSISTANT: Ok, your ticket has been done and your flight number is 1007.

USER: Thank you so much.

ASSISTANT: Thank you for reaching us.