You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

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

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

USER: I prefer to travel on Aug 12 and Aug 14.

ASSISTANT: May I know your name please?

USER: I am Carolyn Mitchell.

ASSISTANT: Can I know the connection limit please?

USER: I prefer to travel in a connecting flight.

ASSISTANT: Do you have any requirements?

USER: I prefer to travel in economy class.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

ASSISTANT: Sorry, there are no flights available as per your request.

USER: Ok, no problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your information.