You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Carol Allen.

ASSISTANT: How can I assist you?

USER: I planned to meet my friend in LAS, can you please help me to book a flight ticket from IAH?

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

USER: I planned to travel on 12/21 and 12/23.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

ASSISTANT: There is a flight in JetBlue airline, can I book it?

USER: Yes, please book it if there is a direct flight.

ASSISTANT: Sorry, there are no direct flights available.

USER: Ok, no problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your information.