You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I would like to make my friend's reservation, can you please help me?

ASSISTANT: Sure, can I know the travel dates please?

USER: He want to travel on 05/17 and return back on 05/19.

ASSISTANT: Could you provide the airport codes please?

USER: Yes, I will travel from IAD to LAS.

ASSISTANT: May I know your friend name please for booking?

USER: Jennifer Mitchell.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

ASSISTANT: Jennifer, there is a flight in AA airline with price 100. Can I book it?

USER: Sure, please book.

ASSISTANT: I have booked the ticket with flight number 1004.

USER: Thank you so much.

ASSISTANT: Thank you for approaching us.