You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I address you?

USER: I want to book a ticket from IAH to OAK, can you help me?

ASSISTANT: Sure, what are you planned trip dates?

USER: My travel dates are May 13 and 15.

ASSISTANT: What is your maximum connection limit?

USER: I prefer a connecting flight.

ASSISTANT: May I know your name?

USER: I am Sarah Miller.

ASSISTANT: Any other requirements to be met?

USER: No.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for waiting, there are no flights available for you matching your credentials.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for choosing us.