You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Elizabeth Young. Can you help me in booking a flight from IAD to MSP?

ASSISTANT: Can you share your preferred travel dates?

USER: My travelling dates are 01/04 to 01/06.

ASSISTANT: Please give me some time, I will look for the airlines providing service on your required dates.

USER: Ok.

ASSISTANT: There is only one flight available on your dates, airlines is AA, shall I book it?

USER: Book it.

ASSISTANT: Congratulations, your ticket is booked successfully, flight number is 1002.

USER: Thank you.