You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Sandra Moore, can you help me to book a flight on 02/14 and 02/16?

ASSISTANT: Sure, can I know the travelling codes please?

USER: I am planning for a round trip from IAH.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

ASSISTANT: There is a flight with price 100, can I book it?

USER: Please book it.

ASSISTANT: Your ticket has been booked with flight number 1001.

USER: Thank you for your help.

ASSISTANT: You are welcome.