You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, good evening.

USER: I am William Smith.

ASSISTANT: Smith, how can I assist you today?

USER: I would like to spend my free time with my family members in Houston city, will you please help me to get flight ticket?

ASSISTANT: Sure, let me know your travel dates.

USER: My travelling dates are 07/01 to 07/03.

ASSISTANT: May I know your source and destination airport code?

USER: I will fly from CLT to Houston-IAH.

ASSISTANT: Please wait for a moment, let me check for the available flights.

USER: Sure.

ASSISTANT: Thank you for waiting, I found a flight for you in Delta airlines, shall I proceed for booking your ticket?

USER: If fare is 200 book it.

ASSISTANT: Sure, your ticket is booked and you may board this flight with flight number 1027.

USER: Thank you.

ASSISTANT: Thank you for choosing our service, have a safe flight.